The River clear cold coffee brew wall mug is a must-have for aficionados, comprising a double-walled tumbler with a removable filter. Simply fill the filter with ground coffee and steep it in water overnight in the fridge; when you're ready for your brew, simply remove the filter and add hot or iced water to the concentrate. The durable, dishwasher-safe mug has a non-slip base and a leak-proof, screw-on lid; with its filter removed, the mug can also be used at coffee shops instead of disposable cups.
