[header] How to avoid stomach problems in less developed countries [title] Boil untreated tap water for 1 minute to kill harmful microorganisms and make drinking safe. [step] The safest drinks are those that have been boiled, such as coffee or tea. All microorganisms are killed in temps above 200 degrees. 
[title] Never add ice to any drink, and don't use tap water to brush your teeth. [title] Stick to bottled beverages, including soft drinks, bottled beer, wine and bottled water, but only if the containers have been brought to you unopened.