· The 10oz FUNtainer® Stainless Steel Insulated Food Jar — featuring Thermos® vacuum insulation technology. Keeps hot food hot for up to 5 hours and cold food cold for up to 7 hours — so soups, pasta, yogurt, and snacks stay at the right temperature from morning prep to lunchtime. No microwave needed at school. BPA-free stainless steel. Dishwasher safe — top rack only. Specifications: 10oz capacity | Double-wall vacuum insulated | BPA-free Stainless Steel | Keeps food hot 5 hours, cold 7 hours | Wide-mouth twist Shop all Thermos® food jars , explore food storage , or view best sellers .