The Nuvita baby food thermos features a screw-on lid that makes it completely airtight, preventing any type of leakage and maintaining temperature for longer. This allows the thermos to be taken anywhere without the worry of spilling your baby's puree, soup, or other foods. The wide opening makes it easy to clean and scoop food directly from inside the thermos. The Nuvita food thermos is made from a double layer of stainless steel and vacuum insulation technology. Therefore, it is ideal for keeping milk and hot drinks warm for 12 hours or cold for 24 hours. The perfect thermos for keeping baby food warm.