|Water bottle garden fence?|
|Fly scaring bag|
|Making friends with a not so feral neighbourhood cat|
After a few more weeks of speculation, I finally asked a Japanese friend of ours about the bottles and found out that they are to scare away cats. Apparently the glinting of sunlight off of water tricks the cats into thinking there is a body of water that they want to avoid. There are quite a few stray cats in our neighbourhood, and it is apparently a serious problem in Japan as a whole, so I can see why people would want to keep them from using their gardens as a litter box, their sheds as a place to have their kittens, or tearing apart their trash. I am really curious about how well these bottles actually work. It seems to me that cats are intelligent enough and have good enough eye sight to figure out that the water is contained inside a bottle. If we ever have a problem with cats lurking around I will have to test its effectiveness myself.
To demonstrate how common these bottles are, all three photos were taken within 100 meters of each other by the canal in our neighbourhood.