The good news for tourists is that, as in the past warning, most popular areas (including Cancun, the Riviera Maya, Mexico City, Los Cabos, Riviera Nayarit, Puerto Vallerta, San Miguel de Allende, Guanajuato, Merida, Chichen Itza, Huatulco and Oaxaca) are exempted.
Super Chill Mountain Chill Soda Ingredients Carbonated Water, High Fructose Corn Syrup, Orange Juice From Concentrate With Other Natural Flavors, Citric Acid, Potassium Benzoate (A Preservative), Gum Acacia, Potassium Citrate, Caffeine, Calcium Disodium Edta (To Protect Flavor), Yellow 5, Brominated Vegetable Oil
A 50/50 mix of ice and water is a good rule of thumb. If you just need to chill one or a few drinks, this is fine. If you have to chill many drinks, you're better off using a cooler or even your bathtub. http://pad2.whstatic.com/images/thumb/5/53/Chill-a-Drink-Quickly-Step-1-preview-Version-2.jpg/550px-Chill-a-Drink-Quickly-Step-1-preview-Version-2.jpg.