Just
buy some blank soft tip 510 cartos and refill with your own
juice. Cartos are much easier to refill than carts and last me about an hour of chain
vaping between refills. I can get a whole day at work out of a carto without refilling. This gives you a larger choice of flavors and is much less expensive than buying prefilled cartos. I take the cap and the rubber piece under the cap off, throw then away, drip 15 drops on a used and 25 drops on a new carto put my drip tip on and vape away.