Collapsible. Our canteens are designed to be used by hikers, campers, soldiers and workers in the field. Official government canteen. Made In USA. Holds 2 quart of any type of liquid. Cap is secured to canteen. Fits in GI style canteen covers. Printed on front: U.S. BPA free. Olive Drab GI 2 Qt bladder canteen. This product is GSA Compliant.