[TheOtherHobbes]

Coke and potato chips are not at all inexpensive if you include the health costs.

They're pretty good examples of things that are cheap and don't work very well, if your goal is health and not distraction/entertainment.

[CRConrad]

But health isn't the goal when people consume Coke and potato chips, and conversely if health is your goal you don't consume Coke and potato chips.