Your favorite drink deserves better than a weird metallic flavor or a fade to room temperature. We made the Iron Flask 32 oz Rover Tumbler with the highest-grade stainless steel and double-wall insulation to keep your beverages piping hot for 5 hours or ice cold for 20 hours without sweating or tasting like a handful of pennies. To make it even better, we powder coat every tumbler cup to keep it damage resistant and we include 2 straws apart from the leak-proof flip-top lid in case that’s more your vibe.