  We study the dynamics of surface waves on a semi-toroidal ring of water that
is excited by vertical vibration. We create this specific fluid volume by
patterning a glass plate with a hydrophobic coating, which confines the fluid
to a precise geometric region. To excite the system, the supporting plate is
vibrated up and down, thus accelerating and decelerating the fluid ring along
its toroidal axis. When the driving acceleration is sufficiently high, the
surface develops a standing wave, and at yet larger accelerations, a traveling
wave emerges. We also explore frequency dependencies and other geometric shapes
of confinement.
