Blue Ridge Outdoors just released their BEST IN SNOW: TOP WINTER GEAR PICKS REVEALED and they nailed it by including the RevoMax Vacuum Insulated Thermal Flask. Our high performance vessel offers outstanding thermal performance - 18 hours for hot and 36 for cold. That basically means whatever outdoor winter activity you have planned, your hot beverage has your supported all day long. That's right, the cure to belly hypothermia is here and it's found in a stainless steel flask.
You'll have to excuse Blue Ridge Outdoors for featuring our prototype flask (no longer sold), but their list is definitely worth checking out.