Fill pail with syrup feed, replace lid tightly, give it a firm squeeze, flip it over allowing a vacuum to form (a small amount of syrup will drain, so do not hold over hive during the flip,) and then place over hole in the inner cover or lid. If using over inner cover, place an empty deep hive body around it and then top with your telescoping or migratory cover.
Allows bees to cluster right up against the feeder.