This collapsible straw folds up into a small travel size pouch perfect for a keychain, pocket, purse, backpack or anywhere space is limited. The silicone tube runs inside 4 metal hollow pieces which allow the straw to separate when stretched but become rigid and secure when straightened into shape. At 2.8 inches tall and 1 inch wide, it is easy to be green and never use a plastic straw again. As an added bonus, a mini-squeegee cleaning brush is included.