Door in a Jar was one of three inventions by Dr. Bunsen Honeydew which he gave to the Muppets in their attempt to rescue Gonzo from the C.O.V.N.E.T. labs in the 1999 film Muppets from Space. As Bunsen explains, "All you do is open up the jar, fling the contents onto the wall, and poof! Instant door." The doorway created by Door in a Jar looks a lot like the familiar brownstone stoop of 123 Sesame Street.