pringles reduce from 200g to 170g, page-33

Guys, I did a year of marketing fundamentals at uni as it was required to study subjects outside the core curriculum.

The phenomena is called "just noticeable difference" it is basically a formula by which companies can reduce portion sizes without customers noticing.

Yep, every day companies are figuring out ways to make more money off less. BTW you were not meant to notice.