Larger bag
We thought that they were selling a larger bag of chips, in terms of actually having more chips inside the bag. But they are actually literally just selling a large bag that is made for sharing but contains the same amount of chips as the smaller one. Of course, the larger bag costs more money.
It seems like large companies will really do anything just to make a few more bucks off naive consumers. We need to get together as consumers and demand that practices like this be stopped at once. The design team thought that by making a larger bag but offering nothing else inside should be embarrassed.