Insulated Steel Mug

insulated
Protect (something) by interposing material that prevents the loss of heat or the intrusion of sound
Prevent the passage of electricity to or from (something) by covering it in nonconducting material
(insulate) protect from heat, cold, or noise by surrounding with insulating material; "We had his bedroom insulated before winter came"
(insulate) isolate: place or set apart; "They isolated the political prisoners from the other inmates"
(insulation) the state of being isolated or detached; "the insulation of England was preserved by the English Channel"
Protect from the unpleasant effects or elements of something

steel
Mentally prepare (oneself) to do or face something difficult
an alloy of iron with small amounts of carbon; widely used in construction; mechanical properties can be varied over a wide range
cover, plate, or edge with steel
get ready for something difficult or unpleasant

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