Drink water in hardcore mode

I think this would be a great idea because it would make hardcore mode more difficult and therefore more fun. It would also add another use for water bottles other than enchanting. There are already mods for this but nothing beats Mojang's own implementations. Don't make it too often. Maybe a bar with 10 icons and every 5 real life minutes one icon disappears. Also when you reach 0 there is a 1 minute grace period before effects start taking place. So you could find a water source. The effects could be either slowness, nausea or drop down to one or two hearts (Kinda like poison but less intense) or a combination of these!

Mojang is probably not gonna add this but it would be fun to at least have an option like that when creating a world.