[mcquinn]

On cartos the element is in direct contact with a fiberglass type fill.On cartridges where you use the Fluval the filler does not contact the element.The Fluval or Blue foam meters the liquid to the bridge which is in close proximity to the element and the liquid heats up and vaporises.If you stuffed the plastic filler in a cartomiser 808 or otherwise I am sure it would just melt.I pulled the filler out of a carto and used it for dripping and other than the leaking it worked pretty good.There are some who boil or otherwise clean and reuse cartomisers and I suppose that would work if you don't let it get too dry, which scorches the filler and makes it taste bad and does not produce much vapor as the filler near the element is melted into a solid blob.I also noticed the few times I used 5 volts with cartridges that the filler and the end of the cartridge melted pretty quick.