I designed this model to hold my Army Painters paint bottles for my DnD minis. It is sized to fit in a Sterilite Stack and Carry 10 5/8"x7 ¼"x7 ¾" bin. Basically I went to Dollar General and bought a basic hobby storage bin with interlocking handles so it can stack. I use two trays per bin and stack them on top of each other.
The main flaw is that there is no center divider locking the bottles into their slots, it relies on having bottles on both sides, so I guess you'll just have to buy more colors! Other than that this has been a solid solution to make them easy to access but also easy to store since I really only paint minis once every 3-4 months.
The author marked this model as their own original creation.