This lunch jar features stainless-steel material for heat retention and a washable outer container for easy cleaning. From our expanded online assortment; not available in all Best Buy stores Vacuum insulation Keeps food hot or cold for hours. Durable stainless-steel construction Delivers excellent heat retention. Washable nonstick-coated outer container For easy cleaning. 3 microwaveable bowls Include a main bowl (20 oz.), side bowl (13.5 oz.) and a soup bowl (9.5 oz.).