When we're after all-day hydration, we're filling up the Stanley Quencher H2. O FlowState Tumbler and settling in to our work-from-home desk or heading out knowing that we've got cold drinks for hours. The double-wall vacuum insulation and stainless steel construction combine to keep things cool, while the FlowState lid features three positions: a straw opening, a drink opening, and a full-cover top. This popular Tumbler holds a full 64 ounces, so we can camel up without needing to fill up all the time.