In the words of the birds, from Matt Adrian
The harmlessly dark sense of humor.
There are birds, and then there is what the birds are saying (squawking? Tweeting?) The harmlessly dark sense of humor is what makes these mugs worth it. The birds are forgettable. It’s great that they’re around, and might be better if they were cute-ified, Renee French style. But it’s what that would make you a hit around the water cooler, if offices still have those.