The first question to ask is whether this is a widespread phenomenon or just another urban legend from the Internet. Actually, there are several explanations and hypotheses that can shed light on the presence of an aluminum flask in the toilet bowl.
1. The role of the aluminum ball
One possible explanation has to do with preventing the formation of deposits and limescale in the water flushing system. Some people believe that adding an aluminum ball to the toilet cistern helps prevent scale buildup on the walls of the cistern. When the water is turned on, the pellet interacts with chemicals and creates microscopic scratches on the surface of the cistern, preventing the formation and accumulation of scale.
2. Water conservation
Another theory has to do with water conservation. According to this explanation, if a ball of aluminum foil is placed in the toilet cistern, the volume of the cistern will decrease and less water will be used during each flush. However, it should be noted that the water saving in this case may be minimal and is unlikely to have a significant impact on household water consumption.
