Durable, reusable mug with advanced hot/cold temperature retention. 1-liter size is great for keeping beverages extra frosty. Flip ‘n’ Sip threaded leakproof tumbler lid Dual-threaded Tritan lid for left and right-handed drinking Double-wall, vacuum-insulated design with a copper lining enhances temperature retention. Food Grade 304 Stainless Steel: BPA Free. Dishwasher Safe Sweatproof exterior (no condensation!) so tumbler isn’t slippery and hands stay dry, plus a built-in rubber coaster on bottom.