I was busy in detail whether the device may contain BPA because after all, above a plastic cover is present and some users have complained about "chemical taste".
The result is: the risk of BPA can be invalidated. In the US, the same device is sold under a different name: Breville One-Touch Tea Maker BTM800XL. Here, American buyers have also dealt with this issue and it was well placed after 2011 note with in the sales package, confirming that the device does not contain BPA substances. If you want to check my research just goes on the American Amazon site and search for "Breville One-Touch Tea Maker BTM800XL". Then the selection by 1 star reviews and examines the user "BB9". Here you can understand the discussion that confirm my statement above.
I am aware that the BPA discussions may not be everyone interested - but I hope hereby agree to have helped. If so, I would appreciate a short click "helpful" to research. Thank you and have fun with the Gastroback.