Verbena, borosilicate glass mug with infuser by Cristel: The modern design combines elegance, while the large removable filter makes it easy to steep all types of tea. It allows you to see all the flavors by observing the leaves and color of the tea. A mug resolutely made for lovers of tea and herbal tea. This double-thick glass mug is safe and keeps your drink warm for at least 4 hours. A must for your long workdays.