Use 1/3 everclear (or anything in the 90% range alcohol), the rest PG (or VG if you find its too thin) and some menthol liquid, me I bought some menthol crystals on ebay, fill a little 20ml jar 1/3 of they way up in crushed crystals, then fill the rest of the way with everclear. Use 1 drop per ml of your liquid. Use 1 drop per 2ml if you want less of a menthol taste, more of a smooth coolness that just gives a nice throat hit without tasting too minty! Use with some coffee/moka flavoring and its the best. 0nic with throat hit, it is possible!