The Orca Stepfit Flex Straws are made from 100% food grade silicone and are the perfect fit for all Orca drinkware. Our patent-pending design ensures a snug precise fit and lets you cut-to-length for any Orca drinkware lid. Three different colors are included in every pack so you can mix and match. A cleaning brush is also included with every set. Please note not compatible with Hydra sport lids.