A functional bee escape.
It is used to remove bees from a box of honey when the super is ready for extraction. Simply place this bee escape in your inner cover, put the inner cover between the super you want and the rest of the hive, and smoke the bees from the top. The bees will flee the super through the funnel and won't be able to return due to the flow of bees in one direction.
It is faster to use than traditional bee escapes and doesn't contain the chemicals of a fume board. This is the solution to honey extraction.