it is usable for cleaning the airbrush . Inside bottom is curvy there is no sharp edges which makes it easy to clean On print profile : there are some mistakes (thats why its 4 star only) as others mentioned you have to print lid with %102.5 uniform resize otherwise lid is not fitting to cup. After resize lid is slightly bigger than cup but it is not disturbing it is actually looking more aestetical this way For lid you need support . If you are using different filament for support interface keep normal spacings etc dont accept the bambu labs recomended settings change . This way it is easier to remove supports and looks better

Nice idea. But the lid won't screw on as there is no lead-in chamber and not enough tolerance in the threads. needs a longer pitch, more clearance and a chamfer Still it did give me the outline to design my own...