Experience practicality with our Forma Professional 11.8-ounce Glass Travel Mugs. The dual-layer design of these mugs boosts heat retention, enriching beverage enjoyment. Made from borosilicate glass, these travel mugs resist breakage. These to go cups tolerate sudden temperature shifts from -40F to 300F, offering drink flexibility. Handcrafted precisely, these clear coffee mugs add sophistication and style to your setting. Built-in handles on these travel coffee mugs spread weight evenly in your grip, minimizing hand stress. The silicone lids of these double-walled mugs form a tight seal. With a slide-buckle feature, these coffee cup lids shut tightly to prevent spills. These mug lids include a lifted spout for easy sipping. These to go coffee cups are safe for microwaves and ovens. Plus, these glass tumblers can go in the freezer and dishwasher. These coffee tumblers measure 3.3 inches in width by 5.5 inches in height and contain 11.8 ounces. Sold in a 10 count box.