Ever stopped to ponder the laundry detergent aisle at your local grocery store? Or the potato chip aisle? Especially on detergent, what's there is a huge proportion of the shelf space devoted to a couple of brands (which may, in fact, be from the same parent company) with very large containers taking up a lot of space for relatively little actual product, but lots of different choices for those brands. Or, as I like to say, 31 flavors of Tide Pods. Same goes for potato and corn chips. Lays and Ruffles dominate, which oversize bags that are half air, relegating other brands to lower shelves on one end. But consumers can "choose" from half a dozen different flavors of the same brands.

And it's the same all over the US. The only variation tends to be that some flavors Flamin' Hot Dill Pickle or Wasabi Ginger, e.g., appear more often in some markets than others.