How do you keep a cup hot?
less water electricity heat energy adding heat energy usage insulation squeeze energy
A B C D E F G H
An insulated cup with a cover is great for keeping beverages warm.
insulated cups keep liquids full of warmth
How do you keep a cup hot? (A) less water (B) electricity (C) heat energy (D) adding heat (E) energy usage (F) insulation (G) squeeze (H) energy