Dice Chalice

I built this dice chalice in FreeCad with the purpose of making something simple, and without support. After watching my players continually dropping dice on the floor during our campaign I also thought it would be good to give them a place to put their dice when they aren't rolling to avoid such a distraction. I tested the chalice multiple times and the dice never seem to jump out so it seems like a decently solid design. I am new to CAD having only watched a few videos on YouTube, so I'm sure there are better ways to design it. Feel free to steel, modify, or whatever.