Max demonstrates the operation of the seltzer bottle.

An ordinary-looking seltzer bottle on the bar in Maxwell Smart's apartment.

When the seltzer bottle trigger is squeezed the nearby wall lamp moves forward, knocking anyone standing under it on the head.

This device is not supplied by CONTROL but at the suggestion of someone Max describes as "a funny little decorator".

[Episode #5: "Now You See Him, Now You Don't", Episode #12: "My Nephew the Spy" and Episode #54: "The Expendable Agent".]