Double wall vacuum insulated Spill resistant: Tri-mode lid for flow control Non-slip silicone base Easy to clean: Dishwasher safe BPA, BPS and BPF free Your ultimate outdoor wingman. The strong and durable 12 oz Camp Mug is constructed in double-walled, vacuum-insulated stainless steel with a powder coat finish. Mug will keep liquids cold for 6 hours and hot for 4 hours. The tri-mode tumbler lid slides open for flow control and is spill-resistant. A non-slip silicone pad on the base provides a soft landing on surfaces to avoid scratches and spills. Dishwasher safe and free of BPA, BPS, and BPF.