Cicerone® Certification Program on Twitter: "Who has had a beer served in a glass like the one on the left? Yuck! #BeerCleanGlass #Cicerone #CraftBeer https://t.co/h9PFo4tKa6" / Twitter
The Beer Clean Glass
Beer glass washing hi-res stock photography and images - Alamy
Dirty Glass! - Black Hops Brewing
Coming Clean about Dirty Beer Glassware
What Is "Beer-Clean" Glassware and How Is It Achieved?