From sunrise to sunset.The strong and durable powder coat finish keeps the Camelbak Horizon Vacuum Camp Mug looking good on the outside, while vacuum insulation keeps drinks at ideal temperature on the inside.The tri-mode tumbler lid slides open for variated flow and is spill resistant when closed. A non-slip silicone pad on the base provides a soft landing on surfaces to avoid scratches and spills.Camelbak Horizon Vacuum Camp Mug FeaturesVacuum insulated: Double wall vacuum insulated to maintain temperature.Spill resistant: Tri-mode lid for flow control.Non-slip silicone base.Durable: 18/8 Stainless steel with full powder coat finish. Dishwasher safe.Drink Clean: BPA, BPS, and BPF free.6 Hours Cold, 4 Hours Hot.