12.4% of U.S. solid waste is plastic. (University of Michigan)
It is testament to successful marketers when their products compete successfully for shelf space or consumer attention. On another scale, I suppose there is a linkage between market share and the proportional contribution to litter.
That is my perception after a few hundred of these daily walk/reflections about picking up someone else’s discards.
It is very nearly a called shot: the beer cans will be of the Coors or Anheiser Busch variety. Fast food is invariably McDonalds or Burger King (although Wendy’s seems to be gaining ground). Bottled water is Evian or Deer Park or other more generic names from Walmart or others. As for soda, Coca Cola rules the pathways with Pepsi a fairly close second.
Those are what my experience shows but they are far from the only brands. Someone would have to sort through the photos and count the brands by name. But brand name or no, it all adds up to unwanted volume.