Ok so I was looking at the ZFM but didnt have a straw so here is how I did mine ..... you need a Vapor 4 LIfe cartomizer with the rubber mouth peice I got mine from the peppermint icecream carts that my hubby uses. the rubber part is all you need from the carto. use a box cutter to make the rubber peice the shape of the zfm plug to fit inside the cart it is easy I made it perfect the first time. What is nice about this is it already had a hole in it and if you make it fit real tight then there is no need for a ledge for it to sit on because it is so thick it works like a cork in a wine bottle. The hole will line up with the atty bridge inside. Now before putting your new cart/plug mod into the atty push the plug into the cart just below the edge maybe 1-2mm and the first time ease it onto the atty so you dont hurt the bridge. Now no flavor but juice no burning no melting at least not for my use. If anyone tries this tell me how or if it works for you. You have to pop it out to refill but it worked good for me. Been trying it about 3 days just to make sure it works before I posted this.