I've been labeling my refills with a sharpie but have found that it rubs right off and then I can't tell what is what. A standard ball point pen doesn't seem to work at all. Any suggestions?
Dear Carto,
Please refill yourself.
Sincerely,
Brad

.........Sharpie also makes water-based silver markers (the kind you're likely to find in stores...I had to go online to find the oil-based paint markers/pens) so it can be a bit confusing.
the sharpie silver doesn't work for me but the pilot gold/silver paint pens do. comes off with a soaking in alcohol.
