ZWILLING Thermo is the healthy, sustainable choice for enjoying home cooked meals or home brewed drinks on the go. Whether you are taking your lunch to school, your coffee to work, infused drinks on a hike, or a cold beverage on a long drive, Thermo offers leakproof, double-walled vacuum insulated containers of superior design.Designed for flavored waters, teas, and other beverages that are infused or steeped. An integrated filter keeps tea leaves, steeping herbs, and infusing fruit out of the pouring area so you achieve maximum flavor with no residue in your drink. And the filter is removable for easy clean up. Hot beverages stay hot for up to 7 hours and cold beverages remain cold for up to 10 hours.