This handy water flask from Grand Trunk stashes easily inside your coat. Where else to keep it from freezing on those sub zero days. And it doesn’t look like you’re suspiciously carrying booze.
It comes with a fitted neoprene koozy that provides extra insulation. Made of single wall aluminum, totally BPA free. Capacity: 400ml. or about 15 ounces. Measures 6 1/2″ tall, x 3 3/4 wide x 2 1/8″ (165 x 95 x 55mm).