Buying guide
Non-toxic water bottles: what to check
Plain steel or glass, and a lid whose plastic has a name. Those two things separate the best bottles from the rest.
Uncoated 18/8 stainless or glass, with every part named. Pura Sport Mini scores 96: no plastic anywhere. KeepCup Helix Thermal (87, AU) names every part. Bottles with a coated interior score lowest: Zojirushi’s is PTFE.
It is a disclosure score out of 100, not a safety rating: what it is made of, who tested it, where it is made, whether the claim matches the evidence. A product can score 20 and be perfectly fine to cook in. What a low score means is that nobody outside the company can check. The rubric is here.
Our picks
Pura Sport Mini 11 ozSteel and platinum-cured silicone. No plastic at all.96/100See the full entry →
KeepCup Helix ThermalEvery part named with its resin code. Sold in Australia.87/100See the full entry →
Klean Kanteen Kids Classic 12ozSingle wall, so no sealing dot. No interior lining.83/100See the full entry →
Three things to check
You drink through the lid. KeepCup names polypropylene #5 and LDPE #4; Nalgene’s cap has no published material at all.
Insulated bottles are sealed at the base. YETI says lead solder is used in its vacuum seal, outside the drink chamber and under a base cap. Single-wall bottles have no seal. What the dot is.
Zojirushi’s interior is a two-layer PTFE coating, named only on its blog (33). frank green says “nano ceramic”, a trade description, not a material (34).
The bottles in this guide
| Product | Score /100 | What touches the food | Our call |
|---|---|---|---|
| 96 | 60/60 | Best material | |
| 87 | 60/60 | Best material | |
| 83 | 60/60 | Buy it | |
| 83 | 60/60 | Buy it | |
| 81 | 60/60 | Buy it | |
| 81 | 60/60 | Buy it | |
| 84 | 60/60 | Buy it | |
| 36 | 22/60 | Read the caveats | |
| 34 | 26/60 | Read the caveats | |
| 33 | 14/60 | Read the caveats |
- 96/100
- 87/100
- 83/100
- 83/100
- No maker photo81/100
- 81/100
Lifefactory 22 oz Glass Bottle · US“Soda lime glass” (stated in the FAQ, not on the product page)
The full entry → - No maker photo84/100
- No maker photo36/100Nalgene 32 oz Wide Mouth Sustain · US
Tritan Renew — “material derived from 50% waste plastic (using ISCC certified mass balance)”
The full entry → - No maker photo34/100
- No maker photo33/100Zojirushi 35 oz Stainless Bottle · US
18/8 stainless with a double-layer PTFE nonstick coated interior — the chemistry named only on Zojirushi’s design blog, not on the product page
The full entry →
Questions people ask
What is the most non-toxic water bottle?
On what makers disclose, Pura Sport Mini (96): 18/8 stainless and platinum-cured silicone, with no plastic anywhere. In Australia, KeepCup Helix Thermal (87) names every part, down to the resin codes.
What is the safest water bottle for health?
Uncoated stainless steel or glass, with a lid whose material is named. We score what makers publish, not health outcomes, and we do not lab-test.
What is the healthiest type of water bottle?
Plain stainless steel or glass. Both hold water without a liner. Steel survives drops; glass can break but has no metal at all. Coated interiors and unnamed plastics score lowest in our tables.
Do stainless steel bottles contain lead?
The steel does not. Some insulated bottles use lead solder to seal the vacuum at the base, outside the drink chamber and under a base cap. YETI says so for its Rambler, and reports lead “not detected” in its testing. Single-wall bottles have no seal. The sealing dot explained.
Related
Sources
- Pura Sport Mini 11 oz — maker or retailer page. www.purastainless.com
- KeepCup Helix Thermal — maker or retailer page. eu.keepcup.com
- Klean Kanteen Kids Classic 12oz — maker or retailer page. www.kleankanteen.com
- bkr Little Bottle 500 ml — maker or retailer page. mybkr.com
- Oasis Insulated Drink Bottle 750ml — maker or retailer page. www.reusableplanet.com.au
- Lifefactory 22 oz Glass Bottle — maker or retailer page. lifefactory.com
- YETI Rambler 26 oz Straw Bottle — maker or retailer page. www.yeti.com
- Nalgene 32 oz Wide Mouth Sustain — maker or retailer page. nalgene.com
- frank green Ceramic Bottle 1L — maker or retailer page. frankgreen.com.au
- Zojirushi 35 oz Stainless Bottle — maker or retailer page. store.zojirushi.com
- MessyPig, Lead in stainless steel water bottles: the sealing dot. MessyPig, Lead in stainless steel water bottles: the sealing dot
- MessyPig materials rubric. MessyPig materials rubric
One useful email a fortnight
New scores, brands that finally answered, and any rule change that affects what you can buy. The list is not open yet — email us and we will add you when it is.