Ring Holder / Organizer

I like to wear silicone rings. I've amassed a small collection & instead of scattering them loose in a tray, I created this. 

I have ThunderFit silicone rings, which are 8mm deep & 27mm wide (ring size: 11.5). I've included a STEP file if anyone would like to create a modified version. 

Can also be used for organizing US quarters! Quarters 1.75mm deep, $1 is 7mm. 

Note: the filament I used is a wood PLA+, it looks a little stringy in the picture but it's a filament issue, the model itself is fine.