Kindly note any glass cookware is fragile, so please use with care. The glass simmer pot for stove can be damaged by alternating hot & cold. For example, if you take it out of the refrigerator and heat it on the stove. The correct method is to pour some warm water and let the glass heat up slowly before heating on stove. In addition, please do not use a fierce fire. Heating this glass pot with lid with gas on the minimum fire or heating with an induction cooker.