I'm 100% newbie at this, but I want to make my own coffee flavor for 100% vg based juice without nicotine. I was reading somewhere that coffee extraction in e juice is bad because of the oils and lipids in coffee. My question is this: if I were to use the leftover "pucks" from brewing espresso (so already brewed once) and use distilled water to make a kind of cold brew extract from those, would this cut down on the amount of oils and lipids in the extract? Also, what could I use, that is readily available and inexpensive to sweeten my coffee flavor?