Zinn in German language means TIN in English. In olden days, tin as a metal was used abundantly. Tin is corrosion resistant and also has low-toxicity. As a result of this, tin-plated metal is used for storing oil, food pakaging (canned food) and snacks. Source: Wikipedia
Freiling Zinn is a company in Germany famous for its tin mugs, mugs with lids and flutes.
I picked up these marvellous pieces at an antique market in Stuttgart and paid quite a bit. But no regrets, I just love them. Look at the wonderful depictions that shows the mastery of the craftsmen at work. They depict some traditional scenes and inscriptions.