The spout and body are made of PCT resin, which is a safe material with BPA FREE, transparency, heat resistance, and impact strength. It comes with a filter, so you can carry your favorite cold brew tea or fruit tea with you. You can carry your favorite drinks, cold brew tea, and flavored water. Since it comes with a filter, you can use it as a matcha shaker. A filter mesh is set on the inside of the spout.