The easiest way to fill a vapor talk 510 soft top cartomizer
YouTube - How to fill a cartomizer - (soft top)
YouTube - How to fill a cartomizer - (soft top)
Condom refill is much quicker and cleaner than this way and you never have to remove any cap, just my $0.02
Condom refill.....?
@ wphsmike like bella said it depends on how you vape but they can last hours and hours before you need to refill them