You are at a party, and there are atleast a dozen solo cups on the tables. You had the punch....but so did everyone else! You can use a marker and write your name on the cup, OR.....
Etch it on!! This brings me back to when I was 6 years old, and I would turn the white dials of my etch-a-sketch to write my name. Now, 22 years later, I can use my finger nail to write my name on my cup at parties!
The only problem I might have is I wouldn't want people to throw them away!
The company sells solo cups with the labels, or just the labels.
Neither way, I think this is a fun and retro way to mark your territory!