Disposable Flasks in Rich Black, 16 oz, Set of 4 Durable, washable, reusable. BPA free. Made with three layers of ultra strong materials to keep out UV light. When empty, the flask can be folded, rolled or flattened for easy storage in your purse or pocket. Includes a handy clip to attach it to backpacks, jackets, belts, duffles, etc. Weight: 1 Ounce; Capacity: 16 oz.