I brew my wifes teas in a tea press. They are any tea but Chinese which she hates and I cant fool her. Lately I add a little extra leaf so I can enjoy a glass or two. Whenever I brew teas I always pay attention to the wet leaf after decanting. In this case I can stick my nose almost inside the press. There is a aroma that isnt noticeable in the poured tea. It varies from tea to tea although somewhat similar which I will describe as musky. I worked in a vegetable canning factory during the summer months in college. It reminds me of the silage waste stack that was hauled off for livestock feed. The press is pyrex but the last time I was in SF Chinatown during gongfu sessions there is a similar very faint aroma from proximity to the gongfu pots and cups. It is what I term the 'evaporation' aroma as the pot dries out.
Jim
PS I paid a visit to my local tea shoppe hoping that Santa left me something in the discount bin. I picked up an extra special Nilgiri from Dunsandle. A nice light and dark blend TGFOP grade tea. It is delicate so add more than normal. Even then you might wonder where is the caffeine. It will take a couple of cups for the nose and throat to notice. The water can sit on this tea without worries. I dont think of Nilgiri as delicate.