These labels cost money. Don't be an asshole, and only print stuff that is really needed.
Hackerspace Printing System For Printing Labels
System status: unknown
Box 'o Stuff Label For SAMLA boxes with common equipment
Preview
Settings
API
$ # To get a label preview
$ curl http://label.waw.hackerspace.pl/stuff/preview/60/?text=foobar&html=0 | feh -
$ # To print the label
$ curl -d "" http://label.waw.hackerspace.pl/stuff/print/60/?text=foobar&html=0