Looking at the cup below, the standard drink sizes for different alcoholic beverages are shown. If you choose to drink and use a solo cup, pour your own drink so you know how much alcohol is in the cup. You can also swap between alcoholic and non-alcoholic drinks, or switch to water or mixers. And if jungle juice or other pre-mixed alcoholic drinks are being consumed, remember only the person who made the mix knows what is actually in it, including how much alcohol was used and the types of alcohol. As a way to ensure a good night out, remember to stay with friends, make a plan with each other for the night, and hold each other to those plans.
Image provided by http://www.studentaffairs.pitt.edu/shsstandarddrink