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    Philips Support

    Why do Avent baby bottles and pump parts get discoloured?

    Published on 14 May 2023
    Discolouration is when Avent baby bottles and breast pump parts change colour, usually to yellow, orange or pink. This can happen because of food colourings that dissolve into plastic material. These colourings can mix with fats and get absorbed into the plastic, causing discolouration.
    Other things that can cause discolouration include residues from previous washes, cleaning agents, calcium buildup from hard water, and direct sunlight.
    Always wash baby bottles and breast pump parts thoroughly with a mild detergent after every use. You can wash them in the dishwasher or by hand. However, we recommend washing them by hand in a clean bowl using a clean brush to avoid contact with food colourings. After washing, disinfect the parts by boiling them in water, which can help delay discolouration and prevent cloudiness and yellowing in plastics.
    Yes, it's safe to use them. The discolouration should not affect the performance or safety of the Avent baby bottles and breast pump parts.
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