Do you need a special cup for netilas yadayim?
A proper washing cup (natla) should hold enough water to cover each hand and is easiest to use with two handles so the hands do not touch between pours.
Why does a washing cup have two handles?
Two handles let you pour over each hand without the unwashed hand touching the clean one, keeping the washing valid and simple.
What is a washing cup and bowl set?
It pairs a netilas yadayim cup with a matching bowl, convenient for washing at the table or by the bedside for negel vasser in the morning.