Get a sink that is integrated into the whole countertop with a ridge around it. I'm picturing something like the "Rattviken" sink at Ikea.

Ikea sink

What about a slop sink?

Trough Sink

https://www.wayfair.com/home-improvement/pdp/scarabeo-by-nameeks-ceramic-oval-vessel-bathroom-sink-with-overflow-sbe10000.html

https://www.wayfair.com/home-improvement/pdp/kohler-iron-plains-trough-rectangle-dual-mount-bathroom-sink-with-overflow-koh22161.html

https://www.wayfair.com/keyword.php?keyword=bathroom+double+trough+sink

are you living with my husband? Sheesh.....water everywhere.

Thanks all!

And WOW greg_2015: my river otter actually picked out that very same sink last night!!

Shock collar.

Yes, get those wall mounted faucets with the backsplashes. Don't mount wall mounts and then have a ledge counter. It needs to drop right down into the bottom of the sink.

Heres mine and works great. 18x18 inches and about 9 or 10" deep. Still going strong after 8 years.

Lol! Best of luck.... :)

https://www.tractorsupply.com/tsc/catalog/livestock/livestock-equipment

Love otters!

IMO the otter gets to clen the bathroom it worked for all our boys who decided standing up to pee was cool not so cool when they had to clean the bathroom so everybody sat to pee really quickly.

Duravit makes the perfect one for us.

I probably should have mentioned that the aforementioned otter can't really help it and therefore cannot be trained, per se. He typically scrubs up to his elbows, thus the extra dripping. Besides a wider/deeper sink, wondering if a motion-sensor faucet might help contain a bit of dripping?

Personally I think a motion detector adds to the complexity. People forget how to turn off taps, lol.

There is also the Kohler Brockway. They come in the 3 or 4 ft model with two faucets, or the 5 or 6 ft models with three faucets.

https://www.us.kohler.com/us/Brockway-3'-wall-mounted-wash-sink-with-2-faucet-holes/productDetail/service-sinks/418116.htm?skuId=345601#crl8-b2c5653a-4798-49f2-a0b7-14c3bf689457

This looks like the 5 ft one with three faucets. They can be wall-hung, set into a countertop, or semi-recessed into a counter with the front protruding past the counter edge and the belly of the sink showing, so there is no counter to drip onto in the front. The backsplash keeps the water contained in the back.

Now there is a sink an otter would LOVE! ha ha, thanks!