I'm not a pro bartender, but I've watched dozens of them shake my
martinis. Sometimes they do a quick rinse. I think the bartenders have
a special solution for rinsing, or maybe it's just fresh water. You
need to get rid of the flavors of the gin botanicals before you shake a
vodka, and vice versa. A quick rinse is enough to do it. I wouldn't
worry about germs. Alcohol---

Pepmax wrote:

I have a question I hope pro bartenders could answer. When bartenders use
those shaker cups for making drinks, do they wash them after each type of
drink made? If so, how do they wash them (with just water as a quick rinse
or with detergent)? If a bar gets busy, how do the bartenders wash the
shaker cups without creating a backlog of cocktail orders?