A price increase by another name.
Years ago, when I was a child, I remember that my mother went to university (she took a degree at night, attending classes three nights a week for a number of years, all the while holding down a day job, and also raising us), where she studied politics, sociology, economics, and psychology.
Anyway, I remember vividly how she explained to me that you can increase prices either by simply increasing the price of a given product, - a situation where the packaging (the size, the quantity remains the same), or by decreasing the size of - the quantity of - the product while keeping the price the same.