United Colors of Ketchup and Mustard Gas February 2012, Cervera de los Montes 48 x 32 x cm Water color and ball-point pen on printed paper bag i United Colors of Benetton is a clothing line of the Italian company Benetton. Mustard gas is a chemical weapon. Ketchup is a tomato sauce. Tags: ketchup, mustard gas, chemical weapons, sauce, color, bag 2 / 2