Why install a bird bath? Bird baths aren't just for allowing birds a place to preen and plump their feathers, but they also allow birds to take a long drink after indulging in your bird feeder. Birds need to drink within a half hour of eating, and keeping a water source close by encourages the birds to stay close to home. If there isn't an accessable source of water nearby, birds are less likely to eat at your feeder and will instead find a feeder closer to a body of water.
At Holland Park we carry a selection of birdbaths in concrete, glass, solar glass, and plastic.