If you want an open stand, like Hydrophyte makes, you could just make a 6 leg table with hex top and lower shelf. This wouldn't be as simple as a rectangular table, but still not that hard to do.
An alternative would be to make a 6 sided tube from 3/4 plywood, the height you want the stand to be. Then add a hex top to it. If you want access to the inside for storage, make one side of the "tube" be a band at the top and bottom, with the middle being a door.