That's what "downsizing" meant before it meant laying off employees.
It's the incredible shrinking shampoo bottle. It's also the incredible shrinking coffee can (or bag). It's the incredible shrinking pumpkin can, which throws off Libby's famous pumpkin pie recipe - which is one reason I use the Eagle Brand recipe.
But even worse, it's the incredible shrinking tuna can. The standard size for a can of tuna is now 5oz. It used to be 6oz, and before that it was 7½oz. Old recipes were written for these sizes and that has to be kept in mind.
Fortunately, salads, sandwiches and casseroles are not an exact science, so you can take Rachael Ray's advice and "eyeball it."