Why wonSim who is a Foodie won't stop trying to drink tap water.

@HuhFaceSus 

You could also add a juice machine and have them make fizzy drinks, then put them in the fridge.  My sims tend to go for those first most of the time.  But they still go after water at a sink, just not as much.  But there is a drawback, unless you queue them to sit down afterwards, they will stand in front of the fridge to drink them and block the fridge for other sims.

Hope this helps.