are glass coffee mugs microwave safe

Are Glass Coffee Mugs Microwave Safe?

Glass coffee mugs have become increasingly popular in recent years due to their attractive designs and affordability. However, the main question that people have is if they are safe to use in the microwave. The answer is somewhat complicated and depends on the type of glass mug you have.

Types of Glass

Most glass coffee mugs are made of either borosilicate or tempered glass. Glass coffee mugs made from borosilicate are safe to use in the microwave. These mugs can handle extreme changes in temperature without breaking or shattering.

Tempered glass mugs are a different story. These mugs are much stronger than regular glass mugs, but they cannot handle the same temperature changes. If a tempered glass mug is heated up too quickly, it can crack or shatter. This can be dangerous, so it’s best to avoid using tempered glass mugs in the microwave.

Tips for Using Glass Mugs in the Microwave

If you decide to use a borosilicate glass mug in the microwave, there are a few steps you can take to ensure your safety and the safety of your mug.

  • Check the Mug for Cracks: Make sure the mug is free of any cracks or chips before you heat it up.
  • Use Low Power: Use the lowest power setting available on your microwave to avoid significant temperature changes.
  • Heat for Short Intervals: Heat the mug in short intervals – around 30 seconds each – to make sure the mug doesn’t overheat.


Glass coffee mugs are an attractive and affordable way to enjoy your favorite beverage. However, it’s important to know which type of glass mug you have before using it in the microwave. Borosilicate glass mugs can handle the heat, while tempered glass mugs should be avoided. With the right precautions, you can safely enjoy hot drinks from a glass mug.

Latest Posts

Send Us A Message

Join us