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Unlimited free refills on sodas at restaurants didn't become normal to the point of being the expected default, IIRC, until the mid 90s or later. I think the e

Unlimited free refills on sodas at restaurants didn't become normal to the point of being the expected default, IIRC, until the mid 90s or later. I think the effects of the unlimited-refills thing, and (relatedly) of to-go soda cup sizes becoming insanely large, doesn't explain the whole thing but probably is a big enough factor to be worth looking at.

pc86 5y ago
"More soda" probably doesn't explain population-level changes over the course of a half century or more.
- brimble 5y ago
  Doesn't take very many more calories per day (on average) to pack on a lot of pounds over a few years. And soda doesn't fill you up.