The ORCA Stepfit Flex Straws are made from 100% food grade silicone and are the perfect fit for all ORCA drinkware. The 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. Not compatible with Hydra sport lids.