High Quality MaterialThis glass coffee mug is 100 borosilicate glass heatresistant from 4F to 302F Microwave and refrigerator safe and easy to clean It is an ideal drinking utensil at present Stronger and more durable than ordinary glass At the same time borosilicate glass is much lighter than ceramic Ideal for elderly or children with weak wrists New Drinking Experience This elegant double walled glasses are with special roll up rim design Thinner mouth than regular doublewalled cups perfect to match your lip and your tone to taste the flavor of coffee better The handle is also specially designed to let various size of hands hold this clear coffee mug comfortably Professional Double Layer Design Hot drinks will not burn your hands and cold drinks will not form condensation No burn marks or wet rings will be left on your especially precious leather or wood table And also keeps your drinks hot or cold for longer than one layer glasses under the same conditions Impress your family and guests with the unique twotiered cup design that hangs your drink from the inside wall Widely Used Each of the coffee mugs holds 55 ounces to the rim which is small enough to perfect match with espresso machine and coffee maker perfect for cappuccino milk espresso juice wine latte or tea bag The air holes in the bottom of the cup balance the air pressure between the inner and outer walls very well To prolong the life of the coffee cup hand washing is recommended Best Gift Elegant and stylish clear glass with gift box packaging perfect gift for coffee or tea lovers Give your loved ones a unique gift on anniversary Valentines Day Mothers Day Christmas and let them enjoy their coffee to the fullest