Modular self-watering planter

This is a modular self-watering planter.
The design was inspired by several designs of planters such as
http://www.thingiverse.com/thing:1277842
and
http://www.thingiverse.com/thing:903411

The planter consists of an outer reservoir and one or more inner cups. One outer reservoir can hold one, two or three inner cups, depending on the size of reservoir you choose.