This reminds me of a very poor decision I made in law school. As is common the urinals in the men’s rooms had writing at the top “1 gpf/3.8 lpf,” meaning each flush consumed 1 gallon or 3.8 liters. So every man was constantly confronted with that conversion. /1
I wish I was at the office so I could share a picture of my bumper sticker saying "Saddam Hussein went to Carolina" that was popular when I was at Duke. It has a cartoon of Saddam in a UNC sweatshirt.