Your perfect morning is only a Glass Mug Set away. Elevate every sip of espresso. latte. chai or earl grey with a refreshing. modern take on your favorite mug. This set includes two. 12oz borosilicate glass Coffee Mugs that are perfect for sharing. collecting or gifting to a friend. Each Mug has a sleek. double-walled design that keeps your hot beverages warmer for longer than standard glass. So you can savor every sip.