This collapsible water bottle is made of FDA approved food grade silicone material, BPA FREE and non-toxic. Unfold the water bottle can contain up to 60 ounces of liquid, and can easily be rolled down and slide right into your pocket. You can sip from a straw or chug as much water as you want by switching over it freely without replacing the lid. Whether you love hiking, backpacking through the countryside, or simply keeping things light when you travel. QTY400 and above are based on Ocean Shipping.