This Hydro Flask wide mouth flat cap is a replacement cap compatible with Hydro Flask 18, 40, and 64 ounce wide mouth bottles. It’s insulated to further support your Hydro Flask bottle in keeping your cold liquids cold and your hot liquids hot. If you’ve already invested in a Hydro Flask, don’t sacrifice insulation power by using a different kind of cap.
Hydro Flask pours tons of technology into their bottles in order to offer the ultimate in convenience and temperature retention. Whether you’re traveling with hot, cold, or room temperature liquids, their 64-ounce growler will keep them that way.It features vacuum-sealed, double-walled stainless steel construction that keeps your beverage hot for 6 hours and cold for 24 hours without condensation, which means you won’t end up with a puddle on your desk or a wet spot in your backpack!