Cool Are Mcdonald's Coffee Cups Microwave Safe With These 5 Basic Cues - American Club. Some plastics and ceramics are also safe for microwaves. Why does mcdonalds coffee say do not microwave?
Because paper cups are glued together with plastic or wax that will melt in the microwave resulting in collapse of the cup and hot coffee spilling. When it comes to microwaving mcdonald’s coffee cups, it’s not a good idea. Do not reheat without lid on container or plastics maintaining insulation.
