How do you guys drink tap water?Watch
I've always been used to drinking bottled spring water.
Step 2: Place receptacle underneath nozzle of the tap.
Step 3: Turn tap on and pour to desired level.
Step 4: Turn tap off.
Step 5: Consume orally.
I'm not sure what the water is like in Westeros but here in the UK there's really no reason to avoid tap water at all. All you'll do if you drink bottled water is give yourself a weak immune system.
Drinking chemically treated water containing possible contaminants is not worth the small boost to my immune system which I could achieve quite easily through excerise/eating healthily and maybe even vitamins.
Truth about tap water.