Double walled stainless steel food jars keep food hot for 5 hours or cold for 12 hours, all while looking rather charming. To pack hot food, warm up the thermos with boiling water. Let it sit for a few minutes with the lid on, then drain the water. Add hot food/drink and put the lid on. To pack cold food, place the thermos in the fridge/freezer or fill with ice. Then remove the ice, fill the thermos and put the lid on.
