Is heating plastic milk bottles toxic

Whether heating plastic milk bottles will be toxic depends on the plastic material and heating method. Heating ordinary PET plastic bottles may release harmful substances, while high temperature resistant materials such as PP5 are relatively safe. The heating risk of plastic milk bottles is mainly related to factors such as plastic stability, temperature control, and heating time. Milk plastic bottles may release trace amounts of plasticizers or chemicals such as bisphenol A at high temperatures, especially when PET materials are exposed to temperatures exceeding 70 degrees Celsius. Long term intake of such substances may interfere with the endocrine system, but the short-term risk of a single heating is relatively low. Choosing plastic bottles labeled as microwave usable or PP5 material is safer. These materials can withstand temperatures of up to 120 degrees Celsius and are commonly used for packaging dairy products. Some inferior plastic bottles may contain unmarked recycled materials or additives, and the probability of harmful substances dissolving out after heating is higher. These types of plastic bottles are usually thin in texture, have blurry labels, and are prone to deformation or emitting odors when heated. It is recommended to avoid using non food grade plastic containers to heat milk, especially to be cautious of PVC or PC materials with a triangular recycling mark number of 3 or 7 at the bottom of the bottle.

It is recommended to use glass or ceramic containers for daily milk heating to avoid direct contact between plastic and high temperatures. If plastic bottles must be used, it is necessary to confirm the material's temperature tolerance and strictly control the heating time to avoid prolonged high heat heating in the microwave oven. When storing milk, it is recommended to choose a dark and cool environment to reduce the risk of chemical migration from plastic packaging. When plastic bottles become deformed or discolored, they should be immediately stopped from use.