Microwave coffee
For some people, their morning coffee is like a ritual: calm, methodical and not to be interrupted. For others, it is a quick process ending in liquid being thrown into a thermos as you run out of the door. For parents, it usually involves making a coffee and then microwaving it 2 hours later when you finally get a chance to drink it.
But you really shouldn’t. Not only does it make the coffee taste bitter and ruin your hot drink experience, but it also changes the chemical makeup of the coffee, and can increase the amount of carcinogens (or cancer-causing chemicals) in the coffee. Maybe just make a fresh pot when you have the chance.