Here is an vintage TV as a pen holder. It's a multipart project so you can combine the colors that you want. The parts fits in the TV body, but you need to glue it to secure. Enjoy printing!

In this project you need to use the "Filament Change" option of your slicer to have the diferent color combinations in some of parts like the bottom, the buttons and the ornament. You don't need a multifilament printer to do this, but if you have one is more easy to setup the color changes :)