I am using a regular Reo-style bottle on a mod, and I find that it drain really quick back into itself after a squonk, sometimes not allowing the cotton to absorb the juice. When the bottle is full as all hell, it will work just fine, but once it gets down to 50% full, the trouble starts. It is almost like there is negative pressure in the bottle that wants to keep the juice instead of letting it flow up and stay. This is my first time using a bottle like this, and sadly, I have no extra silicone hose to try other bottles from other mods. it is getting a little tiresome not knowing if I have a primed wick or not.