Upgrade your beverage experience with our Forma Professional 13.5-ounce Glass Travel Mugs. The double-wall design of these to go coffee cups offers excellent temperature retention. Made from borosilicate glass, these reusable coffee cups resist breakage and suit daily use. These double-walled mugs are durable and handle sudden temperature changes from -40F to 300F. Featuring a hand-blown design, these cups add an elegant, refined touch. The included silicone lids of these glass mugs form a secure seal to prevent spills. For smooth flow, the lids of these clear coffee mugs include a raised spout. With silicone sleeves, these to go cups provide a firm grip and shield hands from heat. These glass cups are microwave- and oven-safe, offering versatile heating. To chill drinks, these coffee tumblers are freezer-safe. For quick cleanup, these insulated mugs are dishwasher-safe. These mugs measure 3.5 inches in diameter by 5.9 inches in height and hold 13.5 ounces. Sold in a 10 count box.