Bottle sterilization generally requires boiling for about 8-10 minutes, and the temperature of the water needs to reach 100°C when sterilizing bottles by boiling. Putting bottles directly in boiling water at 100°C will cause them to burst. When the water temperature rises to about 50°C during boiling, bottles should be put into the water and gradually heated to 100°C. Boil the water at 100°C for 8-10 minutes, or extend the time appropriately. The longer the boiling process, the easier it is to accelerate the speed of bottle aging, the need to frequently replace the bottle, bottle sterilization can generally be once a day, after sterilization need to evaporate the water inside the bottle clean.