What brand are the carto's? Personally I prefer the non-joye one's. I prefer to just pop off the soft cap and just fill into the filler.
Boge. I don't see a picture on the LF site, but I assume they're the same kind I've been getting from another vendor - soft cap, and very easy to use and top off. Now that they're here on LF, my entire paycheck will be going here!