Hario Colors Glass Stackable Mug

Yes, the Hario Colors Glass Stackable Mug is made from heat-resistant borosilicate glass, making it perfectly safe for microwave use.

The mugs are designed with a stable base and rim that allow for secure stacking. While you can stack several, we recommend keeping stacks to 3 or 4 high to ensure stability and prevent accidental tipping.

The glass features a subtle grey tint, which gives it a modern, sophisticated look compared to standard clear glass while still allowing you to see the color of your beverage.

With a height of 2.76 inches, this mug is quite compact and should fit comfortably under most standard espresso machines and coffee makers.

Borosilicate glass is known for its durability and resistance to thermal shock. While it is still glass and should be handled with care, it is specifically engineered to withstand the rigors of daily use, including hot liquids and dishwasher cycles.