Anyone have a cat drinking fountain?

[Anordinarymum]

I have three cats, all Siamese and all almost 17.

We have a cat flap which they all use but for some reason they like to 'go' indoors so we have a litter tray .
One of them - the boy cat loves fresh water and sits in the bath watching the water drip and drinks it.
Since he is in there so much he has taken to pooing on the bath mat and sometimes weeing.
I know - when they are this age there are no real solutions !
We are going to start shutting the bathroom door so he can't have the bath water to drink so I am now looking at drinking fountains.
There seem to be lots and vary in price. I am not too bothered about the cost as long as it works.
Suggestions welcome

..and thanks !

I have bought the Catit flower one. It is in the kitchen and all three have looked at it but not yet partaken :)

It is quiet and looks nice.

Tomorrow the bathroom will be cleaned thoroughly and the door left shut.

Cats. Who would have 'em?

The oldest female Siamese has taken to joining me in the bedroom at night and sleeping next to my head. The other female likes to get under the covers. I love them but they dominate my life :)