Your customers will sip happy from their 20oz stainless steel insulated tumbler! This travel tumbler is vacuum-insulated with stainless steel double walls that keep drinks hot for 8 hours and cold for up to 18 hours. The lid will keep your drink in with its spill-resistant, slide lid with rubber gasket and BPA free. Great as promotional product for gyms, but also could be branded for you school, picnic, or company travel.