I've been having trouble with the o-ring coming out of the cap due to expansion. Apparently not that uncommon of a problem vaping certain juices. Well, working 12 hour shifts at a very dirty place and playing with an o-ring just doesn't mix. I got frustrated the other night at work and just put it over the neck of the bottle below the threads and put the cap back on wondering if I could make it to the end of my shift without panicking. Low and behold, it worked without a hitch. No air getting in, no problems getting juice to the atty, no problems whatsoever!! This is now how I use it all the time. Hoping this helps others with the same problem. Frustration solved!
