I pull the tank off, fill it and pop it back on. I tried prefilled tanks in a pillbox. The caps leak a little and I get juice all over my fingers removing the caps. I'd rather fill than replace, just works better for me. Also I run 40mg juice in it so I don't go through nearly as much juice as I normally would.
OK. That is what I thought.
It seems about 6 of one half dozen the other. With the pill box thing you have to dig that out, open it open the cap, pull the used one, recap, put away. Maybe there is some leakage.
With a needle bottle, you have to pull that out un cap, pull the cart, fill it, replace the cart, cap the bottle, etc.
Myself, I had no luck with my needle bottle (leaked a ton/unusable)- I got mine from COV. Are there better bottles out there?
Also seems that in a dark or busy environment or after a few beers, switching carts would be easier.
Another advantage of a separate box of carts would be you could throw an extra atomizer in there just in case.
Last edited: