Refilling with a syringe is fairly easy. Lots of places sell blunt-tip syringes or you might be able to get away with insulin needles (I'm not sure -- pink tipp

Refilling with a syringe is fairly easy. Lots of places sell blunt-tip syringes or you might be able to get away with insulin needles (I'm not sure -- pink tipped luers are the smallest I've ever used). Do use luer-lock though, because the other kind of syringes suck. Just ask your local pharmacy -- they usually carry them and they can be used for all sorts of non-illicit-drug reasons. In the US/Canada Lee Valley sells a set of blunt tip syringes for inks and glues.