Blog 1: Thingiverse
The complex geometry of this shape perfectly illustrates a huge advantage of additive manufacturing. I would assume other processes (i.e CNC routing) of manufacturing would have a much more difficult time handling this type of shape.
Chess's attempt at becoming a spectator sport.
This is obvious... Makes trying to take only one trip for the groceries actually possible. Could also be slightly modified to double as brass knuckles.
I happen to play trumpet and most trumpet players like having a variety of mouthpieces at their disposal. This could allow you to completely personalize the bowl size and depth for WAY cheaper than it would be to have one custom made for you. Also, some larger mouthpieces for other instruments (i.e tubas) can cost upwards of over $100. 3D printing a mouthpiece would only cost the price of the printing material.