I received the plunger today, I filled several 510 cartomizes with it.it works great,I can fill a cart. a lot faster. I used a syringe, I think a bottle with the luerlock top would be the way to go. I will try it when I make my next order. it is a little messy with the syringe,using a bottle would be better I think.this gismo works like freedom smokes claims. thumbs up.