Vacuum insulation technology keeps food hot for hours. stainless steel construction. Discover the perfect solution for keeping your child's meals warm with our Stainless Steel Thermal Food Jar. This vacuum-insulated lunch box is specifically designed to maintain the temperature of soups, stews, and other meals, ensuring they stay hot and fresh until lunchtime. Ideal for school lunches, picnics, and more. Compact and design for easy carrying.