An overly thick exterior will easily overwhelm the filling within, while a too thin shell will not maintain the structure of the bonbon if the centre is very soft.
Yukos officials are defiant, saying that, if the idea is to strip out the subsidiaries and leave an empty shell, their complex ownership structure will make it a tough legal battle.
Hovering close to the ground, each of these thin-shell dwellings is made entirely out of a single concrete slab stretched out to create an energy efficient structure that is environmentally greener than traditional construction methods and cheaper and faster to produce.