Enjoy beverages on the go with our Forma Professional 13.5-ounce Glass Travel Mugs. These travel mugs have a double-wall design for excellent temperature retention. Made from borosilicate glass, these mugs resist breakage. These coffee cups handle sudden temperature shifts from -40F to 350F. With a hand-blown glass build, these reusable coffee cups offer an elegant look. The silicone lids of these travel coffee cups have a spout for smooth sipping. A silicone sleeve on these double-walled glass mugs provides a firm grip and shields hands from heat. For flexible heating, these clear coffee mugs are microwave- and oven-safe. To chill drinks fast, these glass cups are freezer-safe. For easy cleaning, these glass tumblers are dishwasher-safe. These insulated mugs measure 3.5 inches in diameter by 5.9 inches in height and hold 13.5 ounces. Sold in a 10 count box.