When Swivel Bottle launched last year, the flasks that were included were orange and turquoise, or as we like to call them Dutch and Oasis. Since then we’ve added 14 more colors to choose from. These 8 ounce flasks are interchangeable with the Swivel Bottle holder, which allows you to build a Swivel Bottle in any color combination you can dream of. Just let your imagination run wild!