Flakbotle Straw Lid For Hydro Flask Standard Mouth Water Bottle 18 21 24Oz, Flexible Handle Leak Proof Sports Cap Fit For Hydroflask, Flip Straw Top Lids (Black(2Pack))Item size: Mouth diameter 191 Item compatible with:it for Hydro Flask standard mouth (18oz,21oz,24oz)it for Simple Modern Aascent water bottle(17oz,20oz,24oz,32oz,64oz)it for Klean ..