As my other post in this thread gets into, this example of a &quot;nudge&quot; doesn&#x27;t compare to the junk food case, since junk food is effectively designed to hack our brains&#x27; &quot;food reward&quot; mechanisms.  Bag use is effectively neurologically &quot;neutral&quot;, but junk food (and most other highly processed food) is very much not.  &quot;Pringles, can&#x27;t eat just one!&quot; turns out to be a <i>lot</i> more than a marketing slogan.