Zwickel is called a sampling tap on a vat. Also the beer that gets sampled on the zwickel tap is called "Zwickel Beer".
Its an unfiltered, cloudy beer, right after fermentation has been completed.
Needless to tell ya, that I love Zwickel-Beers most.
ahem....my avatar...due to my consumption of too much zwickel beers, my personal development got stuck... :lol:
Cheers :icon_cheers: