Straw Lid Fits Hydro Flask Standard Mouth 21 24 oz Sports Flex Cap Top
COMPATIBLE WITH HYDRO FLASK STANDARD MOUTH - Top straw lid for Hydro Flask Standard Mouth bottle (18/21/24 oz), for Simple Modern Ascent (12/16/20/24/32/64oz), for Klean Kanteen Classic Bottle (18/27/40/64 oz).