Advantage of borosilicate GlassIt is a special glass material which is stronger and more durable than common glass with high temperature resistance.Keeps hot drinks hot and cold drinks cold, while preventing condensation and staying cool to the touch.Double wall borosilicate glass is non-toxic, heat-resisting and brilliance. Absolutely no air bubble on the walls. The double wall stylishly keeps the liquid hot while the outer wall of glass remains comfortable to the touch. Perfectly suited for hot and cold beverages.  Easy to Clean:Durable material that will not shatter like glass |Microwave, Dishwasher, Oven and Freezer safe. Capacity： each mug glass cup ‘s Volume: 240 ml/8.1oz. Perfect Gift: this beautiful Set of 2 glass cups comes in a special design package, and makes a GREAT GIFT for occasions like housewarming, birthday, anniversary, Valentine’s Day, Mother’s Day, Christmas, New Year. Maintenance:Avoid using metal spoons while shaking. Also, do not touch metal utensils on the edge to avoid s. WARM REMINDED：There is a small hole in the bottom of the cup, which is the unique trace of the manual blowing process.Not a flaw! Improve the aesthetics to your table and impress your guests with this timeless set of Mugs glasses.