Used a Jumbo Dripper yesterday.. easy to fill removing the top cap and filling directly into the filler.. did not use condom method..rotate while filling and stop after about 15 drops and hand spin with top cap off.. took about 30 drops total before it looked saturated enough.. let it sit for 1/2 hour.. lasted all day of moderate use.. nice draw on a Riva, great flavor (RY4 70/30) and good smooth vapor.. did not loose anything over 7 hours.. I tried to top off once mid-day but it wouldn't take more than a few drops as it was still saturated.. nice carto