One massive exception: reheating coffee. Don’t leave your coffee maker on with a pot there. It will burn your coffee unless you agitate it frequently, which let’s be real, none of us is doing. It’s better to just turn your pot off as soon as the pot is done filling. Want more coffee in an hour? Microwave it. Why? Microwaves work by exciting water molecules. Your coffee will warm up very quickly this way, so go in short bursts and/or lower the power setting. This works for other similar liquids too, like heating up broth before adding it to whatever you’re cooking. Just don’t overdo it in the microwave because it will overflow if you aren’t careful!