I had noticed them a few days ago but didn't really think about them until today. Along a section of road that I go jogging on, there were blue cans roughly every hundred feet or so.
I presume they are beer cans but cannot say for sure because I was running and didn't get the best view. Also, it was raining. They seemed beerish in design and besides, what else besides Pepsi has a blue can? I would notice the big round Pepsi logo on the side if it was there.
What I was thinking is that somebody probably threw them out of a car window. You never see some guy just walking along the road drinking a can of beer, so it must have been from a car. But how do they end up so close together? At the speed a car goes, I would think that if you were throwing out empties as they are created, then each can might be around a mile or so apart--less if there are multiple drinkers in one car, but still further apart than every couple of hundred feet.
What if the drinking was done somewhere and the driver didn't want to bring the empties home? Say it is a teenager and he doesn't want his parents to see the empties. So, some guys park somewhere and drink, then on the way home they throw all the cans out the window? That is plausible. Though if you are going to litter, why not just leave the cans in the area you parked in? Maybe they didn't think of the need to get rid of the cans until they were already under way--this would be typical teenage lack of planning. Also plausible.
Maybe I have the whole temporal scenario all wrong. Maybe it is someone who drinks one beer on the way home every day. He finishes around the same point every time and so the cans are all in roughly the same area.