CanTenna  is an invention the other jokers made for Murr. This is featured in Look Out Below as a Joker vs. Joker Challenge against Sal.

About this Invention

It was Murr's fake invention. It is two tin cans with antennas. Murr claimed it had better reception than a cell phone. Sal argued back saying that it is useless and can't fit in your pocket. Murr said back that Sal's giant Forty-Seven Hour Energy Bar can't fit in your pocket either. After some tense debating, the invention got less votes and Murr received a Loss.