A painting handle roughly shaped after a Citadel paint pot.
Simply add some blue-tac and stick your model on there and away you go.
Not going to win any awards for looks but the simple design is easy to manipulate your mini in your hand to get at all angles.
Also a secondary model of a handle with a vertical piece which is useful for sub-assemblies (e.g the arms of minis) so they can be painted separately. Would recommend writing a number on the bottom of the normal and arm version so you know which arms are for each model.
30% infill was the sweet spot I found for a good weight without feeling too wasteful.
The author marked this model as their own original creation.
