A ceramic mug that doesn't get hot from cold drinks in the microwave is typically referred to as a "microwave-safe" or "heat-resistant" mug. These mugs are designed to withstand the heat generated in the microwave and maintain a cooler exterior temperature.
When looking for a microwave-safe ceramic mug, it is important to choose one that is explicitly labeled as such. Microwave-safe mugs are typically made from materials that can handle the rapid heating and temperature changes in the microwave without cracking or getting excessively hot.
One common material used in microwave-safe ceramic mugs is borosilicate glass. Borosilicate glass is known for its excellent thermal shock resistance, which means it can withstand sudden temperature changes without breaking. Mugs made from borosilicate glass tend to heat more evenly and have a reduced risk of getting too hot to touch.
It's worth noting that even with a microwave-safe ceramic mug, the liquid inside the mug may still become hot due to the heating process. The primary purpose of a microwave-safe mug is to ensure that the mug itself doesn't become dangerously hot, making it easier and safer to handle after heating.
When using a microwave-safe ceramic mug, it's always a good idea to follow the manufacturer's instructions and recommendations for safe use in the microwave.