Mouri Kogoro, as popular as he'd become, was approached with many requests to do advertisement for one business or another on multiple occasions. Having already accepted over a dozen such offers in the half-year since Conan had helped him become famous, one or two of the advertisements were bound to flop eventually.
Still, being the face of an energy-drink which made people sick had a funny irony to it. It just went to show: the Sleeping Sleuth couldn't sell energy drinks... That, and looking at his face possibly made people ill...
Conan snickered at the thought, absent-mindedly turning the newspaper.