Just a follow up on these. I have had a number of issues. I bought a five pack.
1. The first time I used it, it killed my Riva 510 battery.
2. One of the Smokymizers in the pack totally didn't work. I had to cut the top off to get my liquid back.
3. Another one in the pack didn't have a wick. I didn't want to risk another battery, so again had to cut the top off to get my liquid back
4. They all taste burnt after a few pulls.
5. They all leak liquid into the tip after a few pulls.
6. One came apart when I tried removing it from the battery - It was impossible to get the wick back into the tank. - Again, cut the top off to retrieve wasted liquid.
In conclusion, when they do work, they give good vapour. But out of a 5 pack, three were faulty and one killed my battery. I can't recommend these to anyone they are a truly terrible, fiddly, leaky and pointless product. I find it hard to believe that people are still selling them as they are not worth buying and are rife with problems.