Different in raw material unlike other glasses, heat-resistant glass uses material that contains strong heat resistant properties which could withstand sudden change in temperature. Different in manufacturing process it also contains borosilicate which makes it capable of withstanding sudden change in temperature, but the costs are very high. Difference in use heat-resistant glass can withstand sudden change in temperature, thus it could be used not only in a refrigerator, a microwave and a dishwasher. Safer with 100% heat-resistant glass normal glass or tempered glass may, with small scratches, be broken and scratches when there is a thermal or physical shock. Lock & lock boroseal uses heat-resistant glass for more safety. Use and care: heat resistant glass is safe for use in the oven and microwave, expanding your range of cooking. Food can be easily stored in the refrigerator and reheated later. Made of high quality borosilicate glass. Clear body to easily see content other features: made of high quality heat-resistant borosilicate glass. Handles remain cool even after microwave use. Different in use reheat straight from the refrigerator to the microwave. Size: 148 x 72 mm. Color: clear. Ideal for separating small amounts of ingredients, for preparing food, such as cakes, pastries, candy, melting chocolate, etc. Excellent for food leftovers such as lasagna, pasta and meat and can go directly to the oven.