I have most of the supplies to start DIY, but am still buying more flavorings, so I haven't actually made any yet. But I use a 40-place test tube rack now, that holds a 10mL bottle nicely in each of the holes (except the 1 at each corner), which is alittle smaller because of the slightly curved corners of the rack. I store my bought eliquids that come in that size in 1 now. The little 10mL plastic blunt-needle tipped bottles that I keep a variety of liquids in also fit in the holes. It even has a letter or number on each row and column of holes, so I know from my little cheat sheet of notes, for example, what flavor is in hole B6 or hole C9, etc.
Since I make jewelry also as a hobby, I use tall tubes with stoppers to keep some of my findings and beads in, and also use racks to organize them.
I bought about 20 of the racks from a plastics company that makes products for the medical, pharamaceutical, laboratory, scientific, and educational fields. They're normally quite expensive ($15.86 each), but I bought them as overstock, so I got a tremendous deal on them ($3.00). I also bought in quantity: 15mL dropper bottles, and 60mL, 150mL, and 250mL screw cap bottles, as well as beakers in 2 sizes, and graduated cylinders! I hit the jackpot on those, too!
As soon as I can figure out how to list some of them in the classifieds section, I'd really like to pass along the deals I got on some of the things to my fellow vapers. They're ALL much higher quality (because of the strict standards required for the above fields/industries) than anything people are buying made in China! They're all: PP, LDPE, HDPE, or PMP, and the specs for each type are very specific as far as temp. ratings, chemical resistances, etc..