I remember making these labels as a kid and sticking them onto my lunchbox, my Donkey Kong Game and Watch and anything really. I think I used one of those Dyno ones where you turn the dial to the letter you want and then pushed some button to make that letter appear. Now you can make virtual labels.
Link sighted on the
Fwak blog.
Link to ACME's label maker:
http://www.acme.com/labelmaker/