Made of BPA FREE food-grade platinum silicone, FDA APPROVED to ensure safe drinking, non toxic and odorless. Suitable for water or drinks foldable water bottle can reserve 550ml liquid with only 198g in weight. It can be folded from 9.8 inch to 5.5 inch in height. Collapsible and lightweight design allows you save 50% space, portable and easier to storage. Great for kids, girls, boys, women, men.