In recent years, a curious sight has become increasingly common in cities and towns across Italy—and in many other parts of the world: plastic bottles filled with water placed outside homes, near doorways, garage entrances, or in corners of buildings.
At first glance, it may seem like a harmless oddity. But behind this widespread habit lies a specific intention. Why are these bottles placed there? Do they actually work? Let’s find out.
The Goal: Keep Dogs and Cats from Peeing on Walls
People who place water bottles outside their homes typically do so with one goal in mind: to stop dogs and cats from urinating near their property. According to popular belief, the water in the bottles creates a visual effect that disturbs animals, discouraging them from marking their territory in that spot.
Some believe that the reflection of light on the water confuses or startles animals. Others claim that dogs see their own reflection and, feeling threatened, decide to back off.
Another theory suggests a more symbolic effect: the bottles serve as a reminder to pet owners to clean up after their animals, encouraging more responsible behavior in shared spaces.
But Does It Really Work? Or Is It Just an Urban Legend?
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