There are a few reasons why you shouldn’t microwave Tim Horton cups.
1. It says so on the cup. Don’t believe me, have a look, if they are putting a warning on the cup it must be there for a reason.
2. The cup is made of paper and can literally catch fire in the microwave.
There is a simple and easy solution, pour your cold coffee into a glass mug and put that into the microwave, trust me your body will thank you.