Shark Skinzz - Reusable Folding Drink Ware & Accessories - Pet Bowls The Sharkskinzz flexible beverage pouch consumes 1/3 the amount of energy compared to other brands Holds 36 fluid oz Collapsible - Stands upright when filled. Flexible, foldable and empties completely flat Easy to pack and use for camping, walks, dog parks, treat containers...