Mainstays Self-Warming Black 12 oz Mug

This is a Mainstays Self-Warming Black 12 oz Mug. It features a 12-ounce, double-wall design. The temperature is adjustable with three levels: 135\u00b0F, 140\u00b0F, or 145\u00b0F. It includes an electric charging coaster that is non-slip. The built-in rechargeable battery keeps the beverage warm for up to 2 hours, or it can be kept on the coaster for prolonged heating. Excellent condition, never been used.