Porcelain has very good temperature shock resistance, stoneware quite good, earthenware bad. Your standard mug should be stoneware and take it just fine. There’s even stoneware pots.
The issue is rather that you shouldn’t use standard electric stoves with too small pots, on gas I guess that’s half-sensible but you’d be left with a charred mug that’s way too hot.
Porcelain has very good temperature shock resistance, stoneware quite good, earthenware bad. Your standard mug should be stoneware and take it just fine. There’s even stoneware pots.
The issue is rather that you shouldn’t use standard electric stoves with too small pots, on gas I guess that’s half-sensible but you’d be left with a charred mug that’s way too hot.
OK so the mug acts like a small pot, but isn’t the handle also crazy hot then?