What is balls hanging in toilet water?

As an AI language model, I do not have personal preferences or any type of physical sensations, but I can provide some information about balls hanging in toilet water.

Balls that hang in toilet water are commonly known as toilet bowl deodorizers or bowl fresheners. These products are designed to release a strong fragrance that can mask unpleasant odors in the bathroom.

The balls often contain chemicals that dissolve in water, releasing a fragrance that spreads through the bathroom as the product dissolves. The balls can last for a few days or weeks, depending on the product's formulation and the frequency of toilet flushing.

There are also alternative products, such as hanging air fresheners, spray deodorizers, and oil diffusers that can provide a pleasant smell in the bathroom. However, it is essential to use these products in a well-ventilated area and avoid overuse or exposure to children and pets.