Water2go Flexible Collapsible Foldable Reusable Water Bottles Set of 4 Includes 4 Ultra Durable Strong Plastic Foldable 16 Ounce Water Bottles! (1 of Each Style Shown) These bottles are very flexible and fold up so they do not take up much room! They come with a carabiner hook so they can be clipped to belts, backpacks, purses, ect When filled they stand like a regular water bottle! Water2Go can be rolled, folded, or flattened when empty making it easy to carry whereever you go!