In beekeeping, a queen clip is a small spring-loaded metal or plastic clamshell-shaped clip designed to pick up or contain a queen bee.
When empty, it can be clipped onto some convenient place, such as the edge of the beekeeper's lapel.
The customer then uses it to introduce the queen into a hive.
The mailing cage has room for the queen and a few escort nurse bees, and some candied honey covering the exit.
The hive's worker bees consume the candied honey over a period of a few days[1] to release the queen.