Insulated Coffee Mug

coffee mug
a mug intended for serving coffee
A mug is a sturdily built type of cup often used for drinking hot beverages, such as coffee, tea, or hot chocolate. Mugs, by definition, have handles and often hold a larger amount of fluid than other types of cup.

insulated
Protect (something) by interposing material that prevents the loss of heat or the intrusion of sound
Protect from the unpleasant effects or elements of something
(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"
Prevent the passage of electricity to or from (something) by covering it in nonconducting material