Wisecrack only here, but I remember when I lived in the xUSSR in the early 90s I bought one of those plastic things thinking it'd be great, and first time I tried it, I closed it up at the shop and it broke all the eggs - the egg-compartments were too small!
(on the other hand, the light bulbs they sold there lasted forever!)
Soviet design!
So I went back with the hand-rolled paper cone the shop ladies would wrap them up for you in.