Bringing your own water bottle wherever you go has never been more convenient. The Hydaway bottle is collapsible, making it pocket-sized--easy to store in a backpack, carry-on, pocket or purse. It is made of FDA-certified safe silicone, BPA-free, and is dishwasher safe. It has a flip-up drinking straw and holds 21 ounces. Great for anyone on-the-go.