You just became the most popular person at the campfire, didn't you? That's what happens when you start passing around the Highline Whiskey Flask. You know the drill: sip, pass, repeat! The Highline packs 9 ounces of party right into your pocket. It's made from durable stainless steel and coated with our DuraGrip finish, so this flask can stand up to all the shenanigans your adventures throw its way. High-Grade 18/8 (304) Stainless Steel - highly durable and corrosion-resistant. BPA Free Never Lose Cap DuraGrip Powder Coat Finish - our proprietary finish is both ultra-durable and provides a textured surface for a sure grip.