![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)
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
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Amazon.com | NOVA CERAMICS Reusable Coffee Cup, Ceramic Travel Mug with Lid, Portable Coffee Cup, Unique to Go Mug, Microwave, Dishwasher Safe, 12oz, Black with Running Blue Glaze, Monsoon: Coffee Cups &
![Is ceramic microwave safe? How to check if a ceramic dish can go in the microwave? - Cupstograms.net Is ceramic microwave safe? How to check if a ceramic dish can go in the microwave? - Cupstograms.net](https://cupstograms.net/wp-content/uploads/2023/01/KC-7-4.jpg)
Is ceramic microwave safe? How to check if a ceramic dish can go in the microwave? - Cupstograms.net
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