... at least 24hour.... 4.Capacity:500ml-1500ml Features1.Material:double wall construction,18/0 or 18/8 stainless steel is ... to hold liquid temperature,especially for Water,Tea and Coffee.5.Personality:custom logo & custom brand print are ... production of stainless steel vacuum insulation cups, thermos bottles, sports pots, office cups, sports cups, vacuum cups, coffee pots, auto glasses and stainless ...