One of my biggest pet peeves is when the sink is full of cups...like all the cups in the house. With 7 people drinking water (and getting a new glass every time), we often run out of cups. I decided that to soothe my aggravation, I'd just make a bunch of these "cup identification cuffs". Nerdy? Why, yes. Yes it is.
note: cut your elastic a little longer than the width of your circle. This one was a hair too tight.