These moats are the perfect solution for keeping ants away from syrup or fruit feeders.
Simply fill the moat with water and hang your feeder directly below, preventing ants (who can't swim) from getting to the feeder. Some people jerry-rig systems similar to this using wire, epoxy and old margarine containers; these moats are simpler and more aesthetically pleasing.
The decorative moat, shaped like an inverted umbrella, is made from black powder-coated steel (3 1/4" in diameter, holds 4 oz/118ml). The simpler version is made in the USA from clear polycarbonate (3 1/2" in diameter, holds 10 oz/295ml).