Why do restaurants and hotels often put ice in their toilets?

For illustration purposes only
So people have come up with a way to solve this situation that is both clever, economical and extremely clean, and that is to use ice.

Pouring ice into the toilet will help reduce the evaporation of ammonia gas due to the cold environment and this amount of gas will dissolve with the ice and flow down the drain. Helps eliminate bad urine odors in the bathroom.
Additionally, pouring ice into the toilet creates a low-temperature environment that helps prevent bacteria growth and keeps waste from sticking to the walls of the urinal, making cleaning easier.