The fairest and most effective counterclaim in response to the argument for banning plastic water bottles is:
"There are places where tap water is not drinkable, and in these places, bottled water is distributed in emergency situations and is a lifesaver."
This counterclaim addresses a critical need for bottled water in areas where safe drinking water is unavailable. It highlights that banning bottled water could have serious consequences for public health and safety, particularly in emergencies or in under-resourced areas. This argument effectively broadens the discussion beyond environmental concerns to encompass human necessity and public welfare.