This warming tray features efficient and uniform heating, with a heating film that can heat up to 90℃ within 17 minutes. It also has long-lasting insulation, with a knob to adjust the temperature for continuous heat preservation, maintaining a temperature between 65-90℃. The durable microcrystalline glass material is ultra-thin, lightweight, and easy to carry. The price drops from $25.99 to $8.99 with free shipping.