You can buy these online, or make them yourself. There is a perfectly sized hole on each side,
This one always gets the most- it has been a hot spot for drilling over the years. There is a pile of them in there just over the last few days(mostly today). They always return to the previous nesting site. The key is to eradicate the queen, drones , and larvae if you do get an infestation, then plug the hole in the fall. Place a trap there, and the following Spring you will be amazed.
eta- the holes are drilled on an upward angle, Once they enter, they go towards the light, which is down the bottom. Once in the bottle/jar they are done for. They struggle to exhaustion/fry in the sun, until death. It's glorious, for those who have seen the damage they can do.