In most major South African cities (Johannesburg, Cape Town, Durban) the tap water is perfectly safe to drink. However, in many of the places we visit the lodge tap water comes unfiltered from rivers or boreholes which may not be safe for drinking. This is especially the case in northern Namibia and Botswana. It would be safe to brush your teeth and bathe in this water, but unless the lodge management or your tour leaders have confirmed the water is safe to drink, please stick to bottled water if you get thirsty.