Insulated food jars

If you’re in the habit of taking your lunch to work or school, and you don’t have access to a microwave, you may be tired of brown bagging it with the same old cold sandwich everyday. An insulated food jar, however, gives you the option of bringing along a hot lunch when desired. Make sure to read the instructions when you first purchase your food jar, because while it seems like a no-brainier to simply fill your jar with hot food, some manufactures state that food will stay hotter longer if you first fill up the jar with hot water from the tap and leave it like that for ten minutes or so before filling it up with the hot food.
Insulated food jar:

Insulated food jars pictured:
Left: Thermos 16-Ounce Stainless Steel Food Jar, Plum
Right: Thermos 16-Ounce Stainless Steel Food Jar, White