The Hydro Flask 12oz Coffee Mug combines the mug aesthetics with the abilities of a flask! Able to keep your drink warm for hours; it features an insulted press-in lid which helps with temperature control and is splash-resistant. Featuring TempShield™ insulation with a soft touch finish and Durable 18/8 Pro-Grade Stainless Steel construction. BPA-Free and Phthalate-Free. Manufacturers Lifetime Warranty.