The projet is very simple but created with my kids during a hot summer in the pandemics. We modelled the structure to fit a little USB pump. After an initial trial, we tuned it to make sure the water would not splash out of the small basin.
It is funny to watch the cat discover it and try to drink. To my despair, my cat did not really adopt it, they prefer going to drink in the aquarium or pool (maybe catching a fish while drinking ?)