The Libre Glass 'n Poly Tea Glass Infuser provides tea lovers with the best of both worlds. Its durable Tritan (BPA free plastic) exterior and glass interior have been beautifully crafted with a stainless steel loose leaf filter and BPA free polypropylene lid. The Libre features a dual chamber design to keep your tea warm while leaving the outside cool to the touch. That tight seal is also fully leak proof, so you don't need to worry about embarrassing stains or spillage. Whether you're soaking a green tea or steeping a chai, the Libre Glass n' Poly Tea Glass Infuser meets all of your traveling tea needs.