Holder I made to keep all my Diamine 30ml bottles in order.

I made this to hold all my bottles inside an old cardboard box I have, the nubbins on the lower part of the holder are to keep it centered and away from the walls of the box so it can close properly.

If you just want to keep the bottles on your desk or something you can just print two of the upper parts and glue them together to avoid the nubbins.