If you want to stop your overweight child from eating too much, this cage-like mask could be your solution. The mask makes it nearly impossible to sneak in even a crumb, though it has a cup-shaped mesh to allow the person to breathe. Patented in 1982, this could be something a sadistic diet camp director could impose on those who are trying to lose weight. However, what would stop hungry dieters from taking this contraption off was never made clear.