The Bucket Collapsible Bottle is made of high-quality Silicone Rubber, Stainless Steel and PP. Collapsible bottle design with 500ml volume, making it a cinch to flatten to 50% percent of its original size when empty. The capacity is 216ml after folding. Comes standard with a hook design for the purpose of easy carry. Great for home and office use, or take it with you to the beach, camping, hiking, traveling, and vacationing. Go custom this Handle Collapsible Bottle, and go custom your hydration plan today!