A simple paint holder that is stackable The last picture is using paintholder3 file. It is also stackable just make 2 of them.
Design the way you want your project made. I used an online box creator then tweaked it to suit my needs. I used boxes.py to get the basic build.
Don't forget to resize your tab holes if you are using a different material. If your paint bottles are a different size, you can resize the holes also.
After cutting remove and check for fit.
Glue it all together.