Product Description : A wonderful option for storing food, this transparent glass container and lid is great for heating rice or raw vegetables up to three cups. The lid fits loosely for microwave ventilation, enclosed with a light green silicon rubber on the inner edge to give it a bright, colorful accent. Lid may tighten after heating due to the expanding rubber. Top and bottom is made to easily stack and store. Hario is one of the top brand of glassware. It's not heavy glass but very duarable and good for heat resistent. * Dishwasher safe