Mug Heater

heater
A person or thing that heats, in particular a device for warming the air or water
A conductor used for indirect heating of the cathode of a thermionic tube
A fastball
fastball: (baseball) a pitch thrown with maximum velocity; "he swung late on the fastball"; "he showed batters nothing but smoke"
A heater is object that emits heat or causes another body to achieve a higher temperature. In a household or domestic setting, heaters are usually appliances whose purpose is to generate heating (i.e. warmth). Heaters exists for all states of matter, including solids, liquids and gases.
device that heats water or supplies warmth to a room

mug
A large cup, typically cylindrical and with a handle and used without a saucer
the quantity that can be held in a mug
The contents of such a cup
rob at gunpoint or with the threat of violence; "I was mugged in the streets of New York last night"
A person's face
chump: a person who is gullible and easy to take advantage of