Our eco-friendly, reusable and lightweight Double Wall Mug keeps your beverage hot or cold longer than a conventional coffee mug. It is crafted from strong high-end borosilicate which makes these glasses thinner, lighter, capable of withstanding thermal shock, scratch, and break resistance, as well as dishwasher, microwave, and freezer safe. The unique design creates a thermal barrier that prevents condensation from forming on the outside of the mug, it keeps the liquid hot while the outer wall of glass remains cool to touch. It comes with a 100% biodegradable bamboo lid with a sealed silicone ring to reduce heat loss and prevent spilling. It can also be used as a handy coaster for the mug. These visually appealing & functional Double Wall Mugs are a must-have for every home, restaurant, or cafe. Features: Lead, BPA Free & non-toxic Large & easy to grip handle Chip resistance, dishwasher & microwave safe Can withstand temperature from -4 to 300F Vegan & Cruelty-Free Certified