Choose the container for ablution of the hands at the end of the meal.
A set of Mayim Aharonim is composed of a small Keli and a receiver bowl.
We use it at the end of the meal to clean our hands according to the halakha after a meal of bread.
As it is written in the halakha, Jewish laws: the washing of hands after a meal of bread is an obligation.
In order to avoid guests getting up from the table to rinse their hands, we usually use a set of Mayim Aharonim that is passed between the guests and each turn to a small amount on his fingers in order to rinse them."