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Illustration for Is it safe to use stainless steel water bottles with a plastic lid?

Does warming formula in a plastic bottle increase chemical exposure?

Based on 1 peer-reviewed studybaby
Verdict: Avoid

Yes. Heat accelerates leaching from all plastics. Warm formula in glass and transfer to the bottle for feeding.

What's actually in it

The science on this is clear enough to act on. Chemical exposure from this product type is real and avoidable with a simple swap.

Research on this chemical or material consistently finds exposure levels worth reducing, and safer alternatives are widely available.

What the research says

Yes. Heat accelerates leaching from all plastics. Warm formula in glass and transfer to the bottle for feeding.

The research base on household chemical exposure from everyday products continues to grow. Studies consistently show that material selection is the most controllable variable for reducing exposure at home.

What to use instead

Browse our vetted, non-toxic alternatives. Every product is third-party certified.

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