Solo Cup Lines
There are lines in solo cups to help you with your liquor. The lowest one shows one shot or an ounce. The one above it shows five ounces or a glass. The next one shows twelve ounces or a beer bottle!

Solo Cup Lines
Jerry Can Handles
Why are there three handles on Jerry cans anyway? It turns out that you should use the middle one when you carry it by yourself. The outer ones should be used when two of you carry it! This will distribute the fuel more evenly.

Jerry Can Handles