Paint Mixing Tray with Lid (Prints in place)

Who doesn't know the problem? You mix some paint for your mini, but then you need some more of it half an hour later, but it's all dried up, so you need to mix a new batch. THOSE DAYS ARE OVER. Behold this paint mixing tray with lid :-)

This is my first try on an in-place printing paint mixing tray. I sliced this in Cura with concentric supports, 0.2mm layers and a 0.4mm nozzle. I printed it in PLA. After removing the support below the bottom part and the accessible part between the hinges an