I'm going to the US through SFO from Europe (Germany to France to US) and would like to bring loose teabags of British Yorkshire Tea. They are not packed like they were for sales, but rather in Tupperware because I buy them in big boxes. This might look a little suspicious I believe, and I don't want to get in trouble.
Depends on the tea, check the US Customs and Border Protection's help page. Seems forbidden if the tea contains fruit or vegetable leaves or seeds, including citrus leaves or seeds. But otherwise okay for personal use. But you might want to double check.