I make quite a few of these shallow pots.  They work well for orchids  as the plant can get to specimen size and, as there is not a lot of  mix, repotting is kept to a minimum.  As one can see, they work well  for other plants that require these conditions.

Granite Hills Orchids
1894 Dehesa Rd.
El Cajon, CA 92019
Phone (619) 886-8121