I do lots of small test batches (10 ml) and just write on the bottle with a "sharpie pen" Not even real words... just abbreviations. Worked OK for awhile but now I'm doing lots of them... "S+C", "C and M+P", "SC+B"... have no idea what they are (no notes) had one labelled "BM"... kinda laughed... oh yea "butter mint" (for a minute thought maybe it was... well you get it)