Baby & kids
Polypropylene baby bottles → glass or steel
Preparing formula with hot water in plastic bottles releases particles. Glass bottles avoid it.
Swap Priority
72/100
High priority
Swap Priority 72 out of 100: High priority- Plastic avoided
- ≈ 300 g a year
- Typical cost
- £8 – £25
- Swap from
- Polypropylene (plastic) baby bottles
- Last reviewed
- 26 September 2026
How strong is the evidence?
How the dials work- Exposure evidenceHow strong is the evidence that the plastic version exposes you to microplastics or plastic chemicals?
- Moderate · 3/4
- Environmental evidenceHow strong is the evidence that this swap cuts environmental harm over the product's whole life?
- Emerging · 2/4
- Claim verificationHow well has the alternative's plastic-free claim been verified?
- No product yet
Why swap
Researchers found polypropylene feeding bottles released microplastics during standard formula preparation with hot water and shaking. Infants are the most exposed group.
What to look for
- Borosilicate glass bottles, with a silicone sleeve only if needed
- Stainless steel bottles
- Natural rubber teats if you want to avoid silicone
Watch out for
- Teats are almost always silicone — which counts as plastic
- Never shake formula with hot water in a plastic bottle; mix in glass and cool first
Evidence and sources
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