Superior borosilicate glass. This teapot is built to withstand heat and cold, making it suitable for use on gas stoves, in microwaves, and over direct flame. It provides reliable performance for hot or warm tea brewing. Unique design with dark grey tone. The deep grey finish adds a sophisticated look to your kitchen, while the ginkgo leaf pattern brings a touch of nature to your tea time. Dual infusers. Two built in infusers let you brew different kinds of tea to your taste or create layered flavors in a single vessel for a personalized experience. Walnut wood handle and heat resistant lid. The walnut handle offers a secure, comfortable grip. The patterned lid is heat resistant and adds a chic look, helping prevent burns during handling. 2-3 use scenarios - Morning routine: brew green tea or oolong with one infuser, then switch to a stronger brew with the second infuser for later refills. - Tea tasting or family tea time: prepare two varieties side by side without mixing flavors, serving easily to guests. - Hot or cold tea preparation throughout the day: enjoy hot tea from the stove or microwave, or use the glass for cold or room temperature infusions.