Travel Sustainably is a Teja on the Horizon article series reviewing my efforts to travel more responsibly. This edition reviews new things I tried in my attempt to be sustainable while travelling in TONGA – whether by pre-planning, or from the opportunities I found while there. It covers what I did well, what I would keep doing/using, what I would do differently next time, and what I failed to do. 

Zero waste travel toiletries

Around the time I was planning to travel to Tonga, my sustainable change journey at home revolved around eliminating plastic waste from my lifestyle. Specifically, I had been testing zero waste alternatives to common personal care products. Of course, before I would make my final decision on zero waste bathroom swaps, I had to test whether they would also be suitable for travelling.

I first trialled some of these sustainable travel swaps in French Polynesia, and one was actually after Tonga. But since I was still testing most them during the Tonga trip, I think it’s more convenient to cover my final verdict on zero waste travel toiletries in the article for Tonga.


1. Switching to solid travel shampoo

One of the more popular zero waste travel swaps is solid shampoo. I had tested out shampoo bars by The Olive Tree at home for several months, and felt ready to make the swap when I packed for French Polynesia. I continued using solid shampoo when I packed for Tonga.

To be honest, even before trying it out, I was already packing low waste when it comes to shampoo, because I was re-filling liquid shampoo into my GoToob silicone squeeze bottle. However, I was considering potentially making the solid shampoo swap permanent at home. So I wanted to see whether I’d accept them for travel as well.

How does solid shampoo reduce plastic waste?

Solid alternatives to liquid toiletries are considered zero waste primarily because solid versions mean you can eliminate the single-use bottles that liquid products come in. It also takes up less space, so such products make more efficient use of delivery trips during its logistics.

However, because solid shampoo comes without packaging, you typically have to carry a reusable container for it when packing for travel. Usually zero waste shops sell a tin for this purpose.

What are the additional travel benefits of using solid shampoo?

The main benefit of liquid-to-solid travel toiletries swaps in general, is that you could take them with you as carry-on. Solid shampoo also lasts longer than liquid shampoo of equivalent size and weight, which can be useful for longer trips. Additionally, compared to refilling a GoToob, solid shampoo is a lot less likely to get stolen in hostel common showers (see Sustainable Travel Fail below).

Are there any downsides to switching to solid shampoo?

After persevering with it over three trips and several months at home, I found that solid shampoo takes a lot of getting used to. It’s not as easy to use as liquid shampoo. I might be willing to put up with that at home, but less so when travelling. For instance, sometimes you have to lather and apply several times to get enough for long hair, which can be tricky in tiny hostel shower cubicles that have nowhere to put your toiletries on.

Additionally, sometimes you can’t get the shampoo bar quite dry before you have to pack it for onward travel. Socially, you also can’t really share it if a fellow traveller runs out of shampoo.

Would I keep using solid shampoo for travel?

I’ve stopped using solid shampoo at home. Mainly this was because I seem to get more dandruff with it, which seemed to encourage hair mites. My hairdresser was very unhappy with my scalp health that year. So, all things considered, I decided to go back to The Olive Tree’s liquid shampoo, which I can refill at my local zero waste shop.

My travel shampoo norm has defaulted back to refilling my GoToob bottle with this zero waste supply. However, if I were to do short trips by air more frequently in future, and could get away with only carry-on luggage, I might re-consider solid shampoo.

Kindersoap brand solid shampoo and body soap

2. Switching to solid conditioner

At around the same time as trying solid shampoo, I also tried switching to hair conditioner bars. I found them even more troublesome to use than solid shampoo, and I wasn’t sure if my hair wasn’t better off with no conditioner at all. But I tried it out for travel anyway, for the same reason as I tried solid shampoo.

As with the solid shampoo, you also need a travel container for the solid conditioner. Alternatively, you could cut both in half and put them into the same container.

What are the additional travel benefits of using solid conditioner?

The benefits are basically the same as with solid shampoo. It’s the most beneficial for travellers aiming to eliminate liquids from their luggage.

Are there any downsides to switching to solid conditioner?

It’s just as awkward to use in tiny hostel showers as solid shampoo.

Would I keep using solid conditioner for travel?

I’ve gone back to conventional conditioner at home. Just like my shampoo, I refill it at my local zero waste store, and then refill a GoToob for travel. In fact, I had given up on solid conditioner by the time I packed for Tonga.

If I didn’t already have a GoToob, I might consider using hair oil instead of conditioner for travel purposes. I actually did end up buying tiare-scented oil in Tahiti which worked just as well. Hair oil has the added advantage of being able to be applied after the actual shower, so it could be more convenient in a hostel situation.

3. Switching to solid deodorant

I’ll admit I was reluctant to try zero waste deodorant. It’s just one of those things you don’t want to leave to chance, because smelling bad is so embarrassing. It was one of the last things in my bathroom I swapped for plastic-free, but I did it. By now I have tried two different solid deodorants, but when I went to Tonga I was using Serasi.

I really shouldn’t have worried, and this should have been one of my earlier plastic-free swaps. Both types of solid deodorant worked well, although I personally preferred the texture of Serasi’s blend. I buy them from my local zero waste shop, which is also where I can return the empty tins.

What are the additional travel benefits of solid deodorant?

Solid deodorant takes up a lot less space than conventional deodorant, but it lasts about the same. That’s on top of helping you eliminate liquids in your luggage. Some solid deodorants are also sold ‘naked’, so you can just refill an existing tin. I might do this when I run out again.

The ingredients are also typically non-synthetic, so I’m less worried about whether I’m leaching potentially harmful chemicals into sensitive coral ecosystems when I’m travelling to such destinations.

Are there any downsides to switching to solid deodorant?

As a deodorant, I can’t think of a downside. However, conventional deodorants are often also anti-perspirants. Solid deodorants usually are not.

Would I keep using solid deodorant for travel?

It’s now my default at home and in my travel toiletries bag.

4. Switching to toothpaste tablets

This was my final sustainable travel toiletries swap, and I actually made it well after my trip to Tonga. This is because I took some time testing out zero waste toothpaste alternatives at home. The first available option in Kuala Lumpur was a tooth powder, but I found it awkward to use and very abrasive to the insides of my mouth. So I went back to conventional toothpaste.

Then, Lush began stocking tooth tablets. They came in a plastic bottle, and Lush did not offer refills, but would take back the bottles for recycling. It wasn’t ideal, but I figured on balance it was better to support the effort and see if the product becomes more popular later. Sure enough, now my local zero waste shop also stocks tooth tablets, and I can buy them as refills into my own container.

Toothpaste tablets at the bottom of a blue glass container

What are the additional travel benefits of using tooth tablets?

Similar to other solid versions of toiletries, tooth tablets are essential if you want to eliminate liquids and pastes from your carry-on. You can also calculate in advance how many days’ worth you want to pack, since they are individual tablets.

However, you would need a reusable container for them, so that they don’t get crushed. I have saved one of the Lush bottles, so that it is easier to explain to customs people what it is. My logic: the product is not yet mainstream, and its similarity in appearance to medicine tablets might flag it for customs checks. I’ve never yet been asked, but you never know.

Are there any downsides to switching to tooth tablets?

As the product is not yet mainstream, if you should run out during your trip (or if you’re travelling long-term), it could be difficult to get refills. You might have to intentionally plan layovers in cities where zero waste shops exist.

In addition, at the moment tooth tablets are still significantly more expensive than conventional toothpaste. The loose tablets at my local zero waste shop are much cheaper than the bottled version, but it’s still more expensive than regular toothpaste.

Would I keep using tooth tablets for travel?

It’s now my default at home and in my travel toiletries bag.

Fails: Sustainable travel regrets during my trip to Tonga

As always, I will share the ways that I messed up in my sustainable travel attempts. For my trip to Tonga, the first sustainable travel fail happened on the outbound layover, when I stayed at a hostel in Sydney.

1. Losing my GoToob silicone bottle in Sydney

At this time, I was in between experimenting with various zero waste toiletries options. I was still using solid shampoo. But I had facial cleanser in a GoToob, and I had gone back to refilling hair conditioner into another GoToob as well.

Unhelpfully, the hostel in Sydney had the most cramped shower cubicles I had ever seen. There was hardly room to turn around, let alone a ledge or hooks for your toiletries. I forgot a GoToob after a shower, but remembered it not long after. It was too late. By the time I went back to get it, it was gone. Mind you, there were other conventional bottles of shampoo still lying around the common bathroom area, left untouched.

That was when I learned a downside of the cute GoToobs. They’re more prone to getting nicked in hostels. Still, I suppose someone else now has the kit to go more zero waste.

GoToob @humangear silicone squeeze bottles in green, white, and blue

2. I could have done better with single-use plastic

I also didn’t do as well as I could with avoiding single-use plastic while in Tonga. Part of this was because I got sick at the beginning, and continued to feel a little under the weather thereafter. This makes it a lot harder to be alert and assertive enough to refuse disposable plastic.

Single-use plastic is surprisingly common in Tonga – in airport cafes, snack kiosks, markets. Still, I did manage to use my cloth bags at the Chinese supermarket. And I avoided it in all the ways that I planned ahead for, e.g. drinking water and toiletries.

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Teja on the Horizon is at Big Buddha.

A new landmark on Phuket is this Buddha statue, called simply “the Big Buddha”. It sits on a hill near Kata, which made it convenient for us to visit on the way back from Phuket old town. Of course, if there’s any kind of peak nearby, Jason will want to go to it, the more so if there’s a landmark on top. And I have to admit, it’s a nice complex, and the panoramic views are good.

#bigbuddhaphuket #phuketlandmark #bigbuddha #travelthailand #phuketthailand #phukettour #phuketthailand🇹🇭#buddhiststatue #buddhapark #religiousbuilding #religiousplace#tejainthailand #thailandtrip #visitthailand #travelingram#phuketviewpoint #phuketpanoramaview #gotothepeaks ... See MoreSee Less

A new landmark on Phuket is this Buddha statue, called simply “the Big Buddha”. It sits on a hill near Kata, which made it convenient for us to visit on the way back from Phuket old town. Of course, if there’s any kind of peak nearby, Jason will want to go to it, the more so if there’s a landmark on top. And I have to admit, it’s a nice complex, and the panoramic views are good. 
#bigbuddhaphuket #phuketlandmark #bigbuddha #travelthailand #phuketthailand #phukettour #phuketthailand🇹🇭 
#buddhiststatue #buddhapark #religiousbuilding #religiousplace
#tejainthailand #thailandtrip #visitthailand #travelingram 
#phuketviewpoint #phuketpanoramaview #gotothepeaks
Teja on the Horizon is at Phuket Old Town.

It was probably only earlier in 2022 when I learned that Phuket has an old town with a similar Peranakan culture to Penang. So when I decided to go diving in Phuket, I made a point to see the old town.

It was an interesting mix; at once familiar but also with differences. There was more of a Sino-Thai feel, yet also familiar shophouse architecture and Peranakan culture. The European-inspired buildings are described as Sino-Portuguese, and indeed they were similar to the colonial buildings in Melaka which are mainly Dutch.And you can also still see traces of the Malay people of the island - for example, in facades bearing the crescent and star, and Malay woodwork motifs rather than Buddhist.#oldphuketcity #phukettown #tejainthailand#PERANAKAN #peranakanphuket #insightfultravel#thailandtrip #travelthailand ... See MoreSee Less

It was probably only earlier in 2022 when I learned that Phuket has an old town with a similar Peranakan culture to Penang. So when I decided to go diving in Phuket, I made a point to see the old town. 
It was an interesting mix; at once familiar but also with differences. There was more of a Sino-Thai feel, yet also familiar shophouse architecture and Peranakan culture. The European-inspired buildings are described as Sino-Portuguese, and indeed they were similar to the colonial buildings in Melaka which are mainly Dutch. 
And you can also still see traces of the Malay people of the island - for example, in facades bearing the crescent and star, and Malay woodwork motifs rather than Buddhist. 
#oldphuketcity #phukettown #tejainthailand 
#peranakan #peranakanphuket #insightfultravel 
#thailandtrip #travelthailand

Sustainability information for travellers to Tonga

My Tonga trip was limited to Vava’u and brief layovers in Tongatapu. Noteworthy things I learned that could be useful to a sustainable traveller to Tonga are described below.

1. Logistics and fuel in Vava’u

If you want to get around Vava’u, you will need a car. I saw people walking, and I saw them driving. But I did not see bicycles. Pacific is the only gasoline retailer in Tonga. My host told me it’s a New Zealand company; all fuel in Tonga is from New Zealand. 

For logistics to get to Tonga, see my earlier article.

2. Plastic pollution on Vava’u

There is a lot of plastic-packaged food in Vava’u. I guess it’s not surprising, since it is technically a tourist island, even if Tongan culture is predominant. And let’s be honest, junk food is tasty. All the more reason why we need less problematic packaging for these things.

Consequently, you can see plastic waste on beaches, where people have had picnics. There were no rubbish bins on the public beach my island guide took me to. Predictably, there were junk food wrappers, drinks cans and bottles on the shore. However, as in French Polynesia, I rarely saw plastic while in the sea.

White styrofoam plate lying against beach rock on a Tongan beach

3. Supporting local tourism businesses in Tonga

It’s not for nothing when people say that Tonga is culturally authentic among Polynesian nations. The economy seems very local, and even the tourism businesses seem to be at least partly local. The market in Neiafu sells locally made souvenirs.

Tonga has the self-assurance of a people contented with their culture. It has not been overwhelmed by foreign culture, but neither does it feel apologetic or defensive as might often be the case in post-colonised countries. In fact, in that respect it kind of felt like Oman.

The tourism industry seems proportionate rather than excessive. Although I came in the off season, I don’t imagine that it would be over-touristed in the peak season. There just doesn’t seem to be the capacity for it to happen.

4. Water resources on Vava’u

Iloa had stopped at a swampy depression during our island excursion. It was the island’s only freshwater spring, and was once Vava’u’s original source of water. “Before civilisation,” said Iloa frankly.

Algae covered freshwater bog on Vava'u island

There were new digs for water nearby, but rainwater harvesting is more common now. Around the island, there are many water projects with solar pumps bearing the names of many donor countries. Vava’u considers it ‘good water’.

There was water infrastructure from near neighbours like Australia and New Zealand, which explains Tongans’ favourable opinion towards westerners (given that they are also the only Polynesian nation who were never colonised). But elsewhere on the island, there were also projects by the USA, Japan, and even a Chinese one which looked new.

5. Dietary notes for travellers to Tonga

Food in Tonga is typical of Pacific cuisine. A lot of fruit, roots, and seafood. In Tonga, commercial fishing is only carried out in deep water. Coral fish are harvested, but only for local consumption. On the island, Tongans keep chickens, goats and pigs. Unlike ‘the main island’, Vava’u farms organically. (I assume by ‘the main island’, Iloa meant the capital island of Tongatapu.)

If I were staying longer I’d probably learn how to cook with kape. It is the most abundant carb, and can be purchased without plastic packaging from the market. Vegetables are abundant. I often simply plucked sweet potato leaves growing at my Airbnb (although my host calls it ‘spinach’).

Self-catering vegetarians and vegans shouldn’t have trouble in Tonga. The restaurant menus, however, are short on non-meat / non-dairy options.

Muslim travellers would surprisingly be ok in Tonga, given that a lot of the supermarket groceries are from Indonesia and certified halal, and the fact that there’s always fish. However, Tongans eat pork as a normal part of their diet. Diplomacy would be required in case you receive an offer of such food and need to decline.

6. Cultural & religious considerations in Tonga

Like many Pacific nations, Tonga is predominantly Christian. However, it bears noting that Tonga is very observant in its Christianity. This means that they really do take Sunday as a day of rest, and spend it going to church and being with family. Shops don’t open and it’s not easy to get anywhere. In fact, an article in Real Tonga’s inflight magazine even says that business contracts signed on a Sunday are legally void. Therefore, plan around this if your trip spans a Sunday.

Additionally, the magazine article also requests modest dress of visitors, as would be expected of Tongans. In practice this should not be difficult since the dress norms seemed to be the typical shoulder-to-knee default also common to Southeast Asia.

Carbon offsetting information to Tonga

A return flight between Kuala Lumpur and Vava’u via Sydney and Nuku’alofa produces carbon emissions of approximately 8,559 lbs CO2e. It costs about $43 to offset this.

Pinterest image for sustainable travel to Tonga

18 Responses

  1. Kajol says:

    Being a responsible traveler is certainly the need of the hour. This is quite an information on generating zero waste even when travelling. Looking for Solid shampoos, conditioners and toothpaste tablets to eliminate liquids and pastes while on the go. GoToob silicone squeeze bottles are seriously the next big thing. Very informative. Thanks for sharing.

  2. Paula Morgan says:

    Such important ideas – thanks for sharing them. We have moved to solid shampoo but I have not seen toothpaste tablets before… cool idea.

    • Teja says:

      They are ! I store them in a pretty glass jar salvaged from a wedding favour (can’t remember whose now). The side benefit of all my zero waste swaps is that my bathroom shelf looks much prettier now! I’m glad solid shampoo works for you! I wanted it to work so much… oh well. :)

  3. Holly says:

    Great tips on sustainable travelling! I’ve never been able to bring myself to the solid conditioner on my thick long hair, but I switched to a paste deoderant about a year ago and wouldnt go back!

    • Teja says:

      Same. Solid conditioner just doesn’t work for me. I’d rather use hair oil or nothing at all. Or maybe I didn’t do it right, idk. But I’m lucky enough to be able to refill the conventional conditioner where I am, so I’ve settled on that. :D

  4. Hels says:

    Really interesting article. I hadn’t heard of some of these products before. Well done for persevering with the more tricky ones and saving our planet along the way!

    • Teja says:

      Oh good! Have a look out for them. Sometimes you see new things and don’t know what they’re for until you see someone use it ;)

  5. Josy A says:

    Oooh interesting! I have been on a similar journey, but I had a different con for the solid shampoo when travelling…we always leave it a little wet, and the shampoo leaked out of the tin and make my scissors/tweezers all rusty. :( So we didn’t save packaging as I had to buy new ones.

    One thing I have LOVED is alum crystal – you rub it on your skin after showers and it stops your sweat from smelling. It is magical stuff, I wish I knew about it years ago!!

    I have failed with the toothpaste capsules though. I just hate the taste of them.

    I think my very best product is a moon cup/diva cup. That has helped me reduce sooo much waste each month, plus it’s so much better to travel/hike with.

    • Teja says:

      Ah yes… that’s a good point. If you keep metal tools in the same kit this is another problem. I absolutely agree with the moon cup. I wish I had had the guts to try it earlier. It has a lot of side benefits beyond just the waste reduction. I had much to say about it – that review is here.

      I have seen alum crystals around, but I just can’t wrap my head around why it works hahaha I think I lucked out with tooth tabs since the first one I tried tastes ok, and Lush had several flavours to try out. The one I’m using now is just meh, but I hope the refill brand (haven’t got around to those yet) will taste better.

  6. Thank you for such an informative post. I appreciate your honesty on what worked and what didn’t for you, and most importantly why. I have never heard of toothpaste tablets – going to see if I can source them here.

    • Teja says:

      You’re welcome! Toothpaste tablets are great! All you have to do is chew on them and it just becomes like toothpaste in your mouth. Lush makes a nice foaming one, very like toothpaste. The one I’m trying now is less foamy and feels like there’s less of it somehow, but it does the job. The tablets also look kind of smaller. I’ll be trying the refill version next, which looks like it’s bigger and I hope feels as satisfying as the Lush tablets. The pioneer brand is Bite, which launched in the USA but I can’t get them here.

  7. Alma says:

    A great unbiased review on sustainable travel products. I have used some zero waste products and were quite impressed by them but the points you made are really valid.

    • Teja says:

      Thanks! I think one of the reasons people hesitate to make swaps is they don’t know if it will be terrible or something. It’s the unknown unknowns, you know. So I do my best to actually use the swaps for a while before I write these reviews, so that I can give as rounded a view as I can. That way it will be more useful, and people can better work out which swaps might suit them best.

  8. sue says:

    Really interesting. I am about to start using the solid shampoo & conditioner bars at home as I am consciously trying to cut down on my use of plastics. I certainly understand why they would be the best option for travelling but I was interested to read your other ideas & how these went. Thanks for sharing.

    • Teja says:

      You’re welcome! I think people’s preferences and thresholds are different with personal care products. I find solid soap absolutely fine, or even preferable, for the shower, hand washing, and even dish washing (when oh when will I have the time to write proper circular living articles!). Many find solid shampoo and even conditioner quite acceptable. But idk, as shampoo the difference was too big for me, especially as I can get liquid refills locally.

  9. Renee says:

    Such an informative and important post. As traveller’s we need to really make sure we are compensating in other ways due to our carbon footprint. I like your suggestions and definitely going to try them. Toothpaste tablets – never heard of them, but will seek them out for sure!

    • Teja says:

      I’m with ya, I thought it would be near impossible to think of how to make toothpaste zero waste. And then Lindsay McCormick came up with toothpaste in tablet form! It was genius! Unfortunately, her Bite brand only shipped within the USA so it was another few years until other companies made them, and for me to be able to get it in Malaysia.
      Check out my other article on how to offset travel emissions.

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