Valentine's Day Double Wall Coffee Mug

These two walls of borosilicate glass create an insulating layer of air. This double-wall feature allows your morning beverage to stay hot and delicious, and the glass always feels cool. These double-walled and insulated borosilicate glass pieces are heat-resistant and microwave-safe. Perfect for all drinks like cappuccino, coffee, tea, latte, and espresso. Features Lighter than ceramic mugs Made of heat and condensation-resistant borosilicate glass, which is stronger and more durable than other glass. Recyclable better for the environment Hydrophobic silicone vent that equalizes the air pressure between the two layers of glass. double-wall construction that keeps hot drinks hot and cold drinks cold. Double wall borosilicate glass - one mug 3.82" D x 4.61" H