I don't think people quit smoking because of some print warning on the cigarette pack.
Unless you consider a $1 can of diluted sugar with some artificial coloring and flavor cheap.
Hey, it's a 'secret" coca-cola recipe! :)
It should be available in 'specialty" stores for at least $3.00 a can. Forget the $.50 vending machines. Make it a treat (for Christmas).
Kidding aside, buy whole foods, cook at home, reduce portions, don't have the junk food hanging around check out registers, make the people 'work" for junk - do not facilitate it - just to name a few ideas.