The Libre Tea Glass has a glass interior for fresh taste and a durable poly carbonate exterior.
The stainless steel tea filter is surrounded by BPA free polypropylene as is the lid interior.
Since the Libre doesn’t have a spout like a traditional teapot, there’s no escape route for steam, and steam build-up can cause pressure. For best performance:
Every Libre tea glass comes with an extra seal. Hot water is known to seep through even a 1000th of an inch, so changing out the seal in the filter can sometimes improve performance due to minuscule variations in the seal thickness.
Also, check out this great How to use your Libre Video on YouTube