As a Brewer and a Hunter.....I happen to know that, its a decoy for the elusive IPA duck... they only come in when something good is on tap. But they are not as popular to hunt anymore because in order to use the decoy porperly it must be attached to a kegerator....and as everyone know Kegerators only float for a short time
I figured it out. Its a cane topper. Which means that a lot of canes have the same size threads. I bet if one was to look around and cane heads there would be a myriad of objects that could be used a cool tap handles.