SIZE - Our lids are designed to fit onto hydro all wide mouth bottles flask with the mouth diameter is 2.2’’. Perfectly fits on the Hydro bottles 12, 16, 18, 20, 32oz, 40oz and 64 oz wide mouth water bottle. Please measure your bottle before placing order. SNUG - Makes a Tight, Waterproof Seal on Most 18 oz, 32 oz, 40 oz and 64 oz. Wide-Mouth Insulated Flasks such as Hydro Flask and Frigid Flask PREMIUM - 18/8 Food Grade Stainless Steel Construction HANDY - Cap and Handle in one. Makes Carrying Your Flask a Pleasure. Or Hook it to a Carabiner and off you go. SO COOL - Makes Your Flask More COOL！ Stainless Steel Cap Lid Top with Flip Up Carry Handle for Hydro Flask Type Wide Mouth Bottles SNUG - Makes a Tight,Waterproof Seal on Most 18 oz, 32 oz, 40 oz and 64 oz. Wide-Mouth Insulated Flasks such as Hydro Flask and Frigid Flask