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 temperature for continuous heat preservation, maintaining a temperature between 65-90℃. The durable microcrystalline glass material is ultra-thin, lightweight, and easy to carry. Price drops from $34.99 to $24.49. Shipping is free for prime members or on orders over $35.