This three-level Rummikub tile holder collapses into a compact package for storage. It is designed for standard 28mm X 39mm tiles.

For each holder you will need to print:

1 Base
1 of either “Support (Full)” OR “Support (Minimal)”. Strength is pretty much the same, “Support (Minimal)” uses less material.
1-2 “Extension” pieces depending on whether you want a 2 or 3 level holder. Additional extensions can be added, but the holder becomes top-heavy and unstable.
2 Nubs for every “Base” and “Extension.”

Assembly:

Glue a “Nub” on the BACK surface of the two springs on each of the the “Base” and “Extension” pieces as pictured.
Hold the springs forward when sliding the “Extension” pieces on to the base allowing the “Nub” to snap into the hole. Hold the springs forward to unlock and collapse the pieces together.
Snap the “Support” piece into the holes on the “Base.”