People will eat more M&M’s if they are in 10 colors rather than 7 because they’ll crave the variety. People who have more menu options eat more and if there is any semblance of variety (colors) it ups the intake even more.
In an experiment, people in a movie theater were given tubs of stale popcorn, those who got bigger tubs still ate 35% more.
Professional bartenders cannot overcome this one– they always pour more alcohol into a short wide glass rather than a tall skinny glass.
People who eat at Subway, thinking it is healthy, compensate later by filling up on more snacks than a McDonalds eater.
What Does The World Eat? Take a look at the Hungry Planet.