Coaster Holder for Bauhaus Tray system

Based on the standard 2x2 Bauhaus tray. Holds a 100mm diameter x 5.5mm thick cork coaster because that's what I had on hand and I felt like cork fit the aesthetic. To be honest, I have no idea where I got the coasters, but these ones look pretty similar if you want to try it. https://a.co/d/iu1Y4dZ If it's a little off, you can pretty easily adjust the color ring part.