Beehive wasp protector

Slide this in through the hive entrance with the open end out. The bees work out how to use it very quickly. If a wasp tries to enter, she's in a narrow tunnel which is easy to protect, and the exit is right under the brood where the bees are typically much more numerous, making it a bad decision for the wasp. It goes without saying, that the rest of the entrance should be closed up since you want this to be the only available access.

When printing, I found it works best when printed vertically, with the closed end down. The STL has my own logo, but you can add yours by simply adding a logo.jpg in the same folder as the OpenSCAD source code.