This work of genius is manufactured by Muttropolis, a pet supply company in Solanas, Caifornia. Its official name is the Humunga Stache Durable Dog Toy. It costs $15. It is 6.5 inches long, so it would look really, really funny on a chihuahua. The stache part is attached to a rubber ball, like so:
It's recommended by Chris of Carlsbad, California, the lone commenter on Muttropolis's web site (what the hell is wrong with people?) that you treat it like a ball so dogs will learn that they are supposed to hold in their mouths. Writes Chris: "Even funnier when they come running to you with it in their mouths!" Chris gave it a rating of five paws, the site's highest.
What further endorsement do you need?