Beautiful and practical, the Libre Tea Glass 'n Poly has a health-conscious glass interior for fresh taste and a durable polycarbonate exterior for on-the-go durability. The stainless steel tea filter is surrounded by BPA-free polypropylene as is the lid interior. Your tea stays warm for up to an hour, yet the exterior is never too hot to hold. Travel with your tea in style and class with a Libre Tea Glass.