Drink only bottled water, called agua purificada or agua mineral. It is available even at the smallest stores, and is much cheaper than in North America. Use bottled water even when brushing your teeth. Ask for your drinks sin hielo, meaning "without ice." Skip uncooked foods, fruits with the skin on, and unpasteurized milk and milk products. Words to remember: "Boil it, cook it, peel it, or forget it."