The Hydaway 17 oz Collapsible Bottle is the ultra-stashable, planet-friendly, go-anywhere way to stay hydrated. Its sleek design collapses down to a small disk about 1.5? thick. The unit is leakproof and watertight seals prevent unwanted spills. It is constructed of food-grade silicone and BPA-free plastic. Cleaning is easy as it is dishwasher safe and has a wide-mouth opening for easy hand-washing. Expanded height is about 6" and its diameter is a little under 4".