Rough prototype fit for a heretic bunker made from the packing inserts from a small slowcooker, a plastic cookie tin and a hardback paper insert from some random peripheral gear box
The idea is to PVA glue the cookie tin to the lower insert, then add some supports between the lower and upper inserts to make it look like a concrete bunker while still being able to lift up the upper insert able to place or remove minis.
After i figure out a way to solve that it will get heretic greebling and a proper paintjob.