The Thermos Stainless Steel Can Insulator from Vat19 boasts “double-walled insulation, ensuring your soda remains icy cold for up to three hours; the exterior remains comfortable so you don’t freeze off your hand.” Product page. Video after the break.
The tough, double-walled stainless steel Thermos koozies are very compact and will fit in nearly any car’s cup holders.
[via Vat19]