I'm not noticing an increase of garbage from bottled water. People in my area are too cheap to buy something they can get from a tap for free.
But, styrofoam cups are everywhere. And in the spring, when the wind blows, there seems to be tons of plastic bags all over.
I've never found too much junk in the woods, except where there was an old farm dump. Plenty of old bottles. There is often garbage wherever there is a secluded lane.
Wierdest thing I've ever found in the woods was a condom machine. Dumped there from a robbery, I suppose.