Our Joli glass mug is composed of Borosilicate glass which tends to be stronger and more heat resistant than conventional glassware, yet appears more delicate (although durable) with an air of sophistication. Glass is the ideal material to enjoy the color and clarity of a fine cup of tea. The name "Joli" means "Beautiful" in French, and we feel that this stylish and classical piece of work is just that. This mug comes with an amply sized removeable clear glass infuser, which will allow you to better view the tea leaves dancing in your cup as they infuse. Comes with matching lid. 10oz.