my son is 18 months old already. i don't know that I have to switch to new bottles every a few months (I only changed his nipples for bigger holes). If his avent bottles are still in good conditions (no parts damages nor 奶樽有銀點), do I still need to buy new bottles? thanks for your advices
For PC bottles, better to change them all in every 3 months for the safety sake. Don't wait until you see something appearing on the bottles, or else it will be too late.
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