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hold 30ml bottles and 30ml glass droppers if you don't mind the rubber being squished down a tad. got it for 50% off ($9) at Wally World.
But then you have to lift every bottle to see which flavor it is?
Get you label maker or some ~~scotch~~ masking tape and put it on the lid. Label the location of each flavor.
This could be somewhat of a pain looking at this storage box, but I'm using the plano deep stowaway, and the dividers make spots just big enough for 4 bottles to fit into.