![I put my coffee cup in the microwave and it scorched right on the 'Do Not Microwave' warning. : r/mildlyinteresting I put my coffee cup in the microwave and it scorched right on the 'Do Not Microwave' warning. : r/mildlyinteresting](https://i.redd.it/t2wy30qpkihz.jpg)
I put my coffee cup in the microwave and it scorched right on the 'Do Not Microwave' warning. : r/mildlyinteresting
![Amazon.com: Hao East St Patricks Day Mug St Patricks Day Coffee Cup St Patricks Day Coffee Mug Dishwasher Safe Microwave Safe St Patricks Day 11oz And Mug Black (11oz, Red) : Home Amazon.com: Hao East St Patricks Day Mug St Patricks Day Coffee Cup St Patricks Day Coffee Mug Dishwasher Safe Microwave Safe St Patricks Day 11oz And Mug Black (11oz, Red) : Home](https://m.media-amazon.com/images/I/71uIvm9nb6L._AC_UF894,1000_QL80_.jpg)
Amazon.com: Hao East St Patricks Day Mug St Patricks Day Coffee Cup St Patricks Day Coffee Mug Dishwasher Safe Microwave Safe St Patricks Day 11oz And Mug Black (11oz, Red) : Home
![I feel like this is a good one. I put this ceramic mug in the microwave sometimes and overtime this black sludge appears in the outside? What is it and why do I feel like this is a good one. I put this ceramic mug in the microwave sometimes and overtime this black sludge appears in the outside? What is it and why do](https://preview.redd.it/omkr9m7r1ld01.jpg?width=640&crop=smart&auto=webp&s=78cf0b4e014d28417e156ba1ef725fd743a98b87)