The water bottle is BPA free and odorless, made of grade organic silicone, to ensure safe drinking, no PVC, latex, phthalate and plastic smell, etc. odor. It is safe and hygienic.The patented sealing screw cap is used to eliminate leakage and splashing and effectively prevent the bottle from accidentally opening.The wide-mouth design makes it easier to clean the inside of the collapsible soft water container or add ice or lemon to it. When using for the first time,it is recommended to soak in boiling water for 10 minutes for thorough cleaning.