At the beginning I thought I don't need such a thing. But realized that really you need smth to put the extra water on the baby while bathing. A pot from the kitchen is not a good idea, as it is not safe, not convinient, heavy. And since I did not have anything else small and not heavy, this choice is perfect.
We have very little space in the flat, so both - this pot and the bath itself are foldable, which is extremely convenient for us!