I wouldn't recommend you to test an iPhone for it's "waterproof" feature. God knows what can go wrong

The safest bets are
Samsung Galaxy S8 and
Google Pixel 2/ XL .
You absolutely cannot go wrong with them as they are completely tested. Also, i have a friend who has Samsung Galaxy S8 and the madman actually washes his hands with his phone in the sink

He has had it for a while and it hasn't showed any sign of slowing down, not even one bit.
So if you have the money, definitely go with Samsung Galaxy S8, hopefully i was helpful
