What do you all use to test flavors (not recipes, just individual flavors for the first time)? I do "quick and dirty" tests with a single coil in a RDA. If I want to test quick combos of two flavors I just put a few drops of one, a few of the other and vape. When doing lots of tests I don't even bother vaping all that's in the wick (get too much nic too fast) so just waste it and re-wick. Pull the wick, dry burn and re-wick.
After I get an idea of the flavor (and adjust strength) I use a different method. MTL tank... put 1 ml in, vape it awhile, dump it, then vape some unflavored for awhile, dump it and so on. Don't laugh, but I actually save all the dumped juice (can't seem to waste anything) and call it my "mutt mix". Sometimes it's good... sometimes it does go down the drain LOL.