Yes, that is a water bottle in a fence.
Fellow photographer friend took this picture because it was so random, it gave him a sense of joy. Based from the experience of the photographer, “It was so random, like it was left there. It had such a nice view behind it, and it’s there, enjoying it with me”. Sometimes it’s the most absurd things that hilarious. These are the things that people don’t typically notice in day-to-day life. I laughed when I saw the picture. It’s giving me a little joy also.
“At any street corner the feeling of absurdity can strike any man in the face.” Quotation from Albert Camus