Keeps food warm, longer. Designed for children who need more time than usual to finish a meal. When the chamber is filled with hot water, food will stay warmer for a longer period of time and the added weight provides greater stability. Dish weighs .175 lb. (.08 kg) when filled with water and holds 6 oz. (178 ml). Measures 21/4 high x 51/4 diameter (5.7 x 13.3 cm). Comes with a plastic funnel for filling the water chamber. Top-rack dishwasher safe. Do not microwave.Made from FDA approved materials