Stainless steel thermos. Original, convenient, and very practical. Perfect for purees, soups, milk, etc. Double-walled stainless steel. This stainless steel thermos can withstand heat for 12 hours and cold for 6 hours. Its can-shaped design makes it very comfortable to carry, whether in your purse or backpack. It comes with a folding spoon attached with a silicone strap for added comfort. Reusable. Environmentally friendly. Not recommended for dishwashers.