ALERT. I've been using these for about three days now, and have them in 4 of my REOs. They've been great for ease of squonk and for extra volume, BUT......two of them have sprung a leak. In examining them I've found that each one had a tiny leak right in the corner. One was in a bottom corner, and one was in a top corner. These are both in the medium (9 ml) sized bottles. So far so food on the little 6ml bottles, but I'll admit I haven't squonked them as much, so we'll see on those.
I think it's just that the plastic is very thin on these. With constant pressure on the same spot, they just don't hold up. I've changed my 18650 Woodvil back to my old bottle. Maybe the small size will be okay. To me, that's the most important anyway. I really want that 6 ml of
juice in my Minis and my 18490s. I can live with 6 mil in the Grand.