Insulated Glass Coffee Mug

insulated glass
Sealed double-pane glass units with a vacuum or gas in the space between the panes.
unit Two or more pieces of glass spaced apart and hermetically sealed to form a single-glazed unit with an air space between the glass. (Commonly called IG units.)
Insulated glazing, insulated glass, double glazing, double glazed units (UK and Europe) or Insulating Glass Units (IGU) (North America and Australia) are multiple glass panes or "lites" assembled into units.

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.