USB Cat Coaster Heated Mug Warmer

Diameter: ~12.7 cm (5 inches); height: 4.2 cm. Powered via standard USB interface (30W). Three constant-temperature options: 55°C, 65°C, and 75°C. Features a rotatable, detachable magnetic silicone ring to extend and fine-tune heating coverage for flat-bottomed cups — compatible with stainless steel, ceramic, glass, and baby bottles. Functions exclusively as a heat maintainer: only effective on beverages already heated to serving temperature. Safe for use with laptops, desktops, tablets, and certified power banks. Warning: never touch the heating surface while powered. Optimised for consistent performance in UK climate conditions and typical European office/home voltage stability profiles.