Ive found that boges will allow 5-10 ml vaped through it before it is downhill, and same with dc's. The mega dual coils though, seemed to drop after first fill, so I have to assume they will work the same 5-10 ml. I dont waste time with boiling and all that mess. After all, the polyfill will only act as a water filter, and catch contaminants in the water. To think the water will relieve the carto of contaminants is just backward logic on already proven theories of water purification.Seriously, whens the last time you tried to rinse and reuse a water filter with water? Just my 2 cents.