Sharing is important. Alcohol is a gift from the gods. Drinking alone is mostly inadvisable. Thus, the shot flask is a great invention.
For $25 you get an eight ounce black leather flask comes with a two ounce glass so you and a friend can just pound shots anywhere you go. Maximum portability. Disease prevention. Sharing. The things you learned in college meet the first you learned in college. [CoolMaterial]