A shot glass is a small glass designed to hold or measure liquor, which is either drunk straight from the glass (“a shot”) or poured into a mixed drink.
Shot glasses decorated with a wide variety of humorous pictures, toasts, and advertising, are popular souvenirs and collectibles. Care must be taken when drinking from such glasses, as some of the decorations contain lead.
Most countries have standard definitions of single and double shot sizes (which are not always in a 2 to 1 ratio)
source: www.wikipedia.org
Country Single Shot Double Shot
Russia 5o mL 100 mL
Serbia 50 mL 100 mL
Sweden 40 mL 60 mL
Finland 40 mL 80 mL
Italy 40 or 60 mL /
Germany 20 mL 40 mL
UK 25 or 35 mL 50 or 70 mL
USA 44 mL 89 mL
Australia 30 mL 60 mL
