We think adventures and drinks are better on the rocks, and thanks to Hydro Flask's 10 ounce Rocks glass you can enjoy whiskey at Wallace Falls, rum on Mt. Rainier, or bourbon at Black Butte Lookout. Plus, our TempShield double wall insulation keeps your ice from melting for up to 24 hours, perfect no matter if you're out car camping in the wilderness or enjoying a beverage closer to home. The 10 ounce rock tumbler was designed to have a delicate beveled bottom, providing the perfect shelf for your pinky finger. The 22 ounce Tumbler press fit lids are compatible and comes with your Rocks glass to help reduce spills at the campsite or on the ride to and from the trailhead. Whether you are having a glass of scotch or rum in this insulated tumbler, this rocks glass keeps your drink portable and chilly. This 10 ounce Hydro Flask product is backed by a manufacturer..