An unusual artifact representing a constantly circulating stream of water flowing in a closed loop. Despite being composed of liquid, the Loop can be held in one's hands—the main challenge is not letting the stream slip away, as it can easily "flow" out of your grip. It is said that several stalkers attempted to experiment with the artifact, trying to disrupt the flow of the liquid. However, it merely bent further and returned to its usual pattern of circulation. Nowadays, rumors circulate in the Bar that the artifact does a surprisingly good job of cleaning the inner walls of containers, although this has yet to be confirmed.