Tzumi 12oz. Self Heating Coffee Mug & Coaster

This mug offers three temperature settings: 135°F, 140°F, and 145°F. It features a rechargeable battery for up to 2 hours of warmth, extendable with the charging coaster. The mug includes an auto-shutoff function after 3 hours or when empty for safety. Price drops from $57.99 to $20. Shipping is free over $49.