STAYS HOT OR COLD: THERMOS vacuum insulation technology for max temperature retention of hot or cold meals. Keeps the weather out and the delicious in. Soups stay hot for up to 14 hours and cold foods stay cold up to 24 hours EXTREMELY DURABLE: High quality 18/8 stainless steel construction is dependable any time of the year, from lunch on-the-go to camping in the wilderness SWEAT-PROOF: Exterior stays cools to the touch with hot contents and sweat-proof with cold. THERMOS brand food jars are dishwasher safe, top rack recommended