Yes, Borosil katoris are microwave-safe. Designed from toughened opal glass, these can withstand high temperatures. Since these are crafted from food-safe materials, you can be assured that they will not leach any toxins into your food during the cooking or reheating process. Additionally, the katoris do not stain or retain the odour of the food, making them ideal for repeated use. However, when using a katori with lid, make sure to remove the lid before popping it into the microwave. The lid is made from plastic and is not safe for microwave or dishwasher.