If you want a quality thermos, you want a Stanley. This camp mug version of their indispensable vacuum bottles is sturdy, sharp, and works like a dream. The double wall insulation means your coffee stays hot and your beer stays cold, and the D-ring lets you easily clip it onto a pack if you're on the go.
Keeps drinks hot for 2.5 hours, cold for 4.5 hours, and iced 20 hours
18/8 rust-proof stainless steel
Leak-resistant flip lid