Start your day with our Forma Professional 13.5-ounce Glass Travel Mugs. With a double wall design, these coffee tumblers keep drinks hot or cold for longer. Made from borosilicate glass, these cups resist breakage. Able to handle sudden temperature changes from -40F to 300F, these double wall coffee mugs offer great versatility. Showcasing hand-blown glass, these travel coffee cups add elegance to your routine. To prevent spills, the included silicone lids of these reusable coffee cups form a tight seal. The lid of these clear coffee mugs has a spout for smooth sipping. Fitted with silicone sleeves, these glass coffee mugs offer a secure grip and protect hands from heat. These cups are microwave- and oven-safe for flexible heating. To chill cold drinks fast, these glass cups are freezer-safe. These double-walled mugs are dishwasher-safe. Measuring 3.5 inches in diameter by 5.9 inches in height, these travel mugs hold 13.5 ounces. Sold in a 10 count box.