The collapsible water bottle is made of food grade high quality silicone, 25oz, mold proof and does not contain BPA. Comes standard with super lightweight, easy to clean and is FDA certified. Soft collapsible bottle design, makes it easy to fold, roll or flatten to 25% its original size when empty making it compact and convenient to carry. Whether you're out hiking, camping, running or exercising in a gym, this can be a great item to promote brand awarenes.