Summary

The 3 hole version fits Two Thin Coats and Army painter bottles. The 2 bottle holder fits citadel paint bottles. Combine with a spacer and a lid/base combo https://www.thingiverse.com/thing:7251422 to stack more paint/gridfinity.

OnShape project: https://cad.onshape.com/documents/f472bc51904da4b5abbe7e38/w/a08580b60b1013d44d92e02b/e/a24ad92a791b57c3ab5eaeb9?renderMode=0&uiState=694f4831ab9ba77f14a25a7c