CamelBak knows insulation. The Horizon 10 oz Rocks Tumbler uses the same double-wall vacuum tech they’ve spent decades perfecting for hydration packs. In this case, it keeps a single cocktail cold for the duration of a conversation. The 10 oz capacity is deliberate. It fits a standard rocks glass pour with room for ice, and it holds temperature without the bulk of a 16 oz mug.

The full powder coat finish is key. It gives the steel a texture that stays dry in your hand, even when the glass sweats. The lid slides open for sipping and closes to a spill-resistant seal. On the bottom, a silicone pad keeps the tumbler from sliding on a table or scratching a nightstand. The Moss color is muted and natural, which matches the outdoor-ready build. This isn’t a delicate bar glass. It’s a tumbler you can toss in a bag without worry.

One honest note: the lid is not fully leakproof. It resists spills, but if you tip it over in a backpack, expect some moisture. For desk or patio use, it works perfectly. For a rugged, compact cocktail cup that holds its chill, the Horizon delivers.