Hello, Our product is made of PET (Plastic number: 1) material suitable for contact with food. PET is the most preferred safe type of plastic in beverage bottles. It does not contain BPA and is not harmful to human health. Bottles can be used repeatedly, but for long-term use (such as exposure to very high temperatures, contact with boiling water), it is recommended to wash by hand to maintain the shape. Dishwasher and microwave use is not recommended. In this way, you can safely store your drinks for daily use and use them in a healthy way.