That's very interesting Christina, many thanks for posting your findings. Interesting to see the hop tea was lacking for you, I guess a lot of those aromatic oils would have boiled off at the temperature you ran the tea at,  As I reported, I still stand by the accidental experiment that I made, whereby I observed the PET's absorbing a lot of aroma. Do you think it may be the seal material in the swing top absorbing the volatile oils or can they be leaking past the seal?