I purchased a couple of sets of "LED Throwies Pack" from Zazz (https://www.zazz.com.au/daily/thingy/6047) a while ago - primarily for the cheap CR2032 "button" batteries. Everything arrived, but I found that the batteries were packed in a tape-type plastic and once I took one out I had batteries everywhere. To keep the batteries separated (and make it easier to select "just one") I made this holder.It holds 40 (4x10) batteries. You can print 1 (open top) or 2 (for a full case).