(Can you tell I live at the beach? Look at the sandy soil, lol!)
The left side has been buried since last fall. Some people had questions about whether the border would be affected by the freezing and thawing, but it came through great. Since the bottles are open at the bottom (which used to be the top), it allows for expansion and contraction of the air inside.
The next phase of this project is move my stepping stones to better suit the new design, and then mulch or add gravel to the pathway.