Been making my own for a little over a year. DIY is the only way to go, you can make a 120ml bottle for around 4.50. There are apps for smartphones for mixing measurements. I don't get into the subohm stuff, coils are to small for me to mess with wrapping. I have been using a flavor I made that tastes like Big Red gum for awhile now, might be time to play around and mix up some new stuff.