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
To make baking powder, mix one part baking soda and two parts cream of tartar. So, if you recipe calls for 1 tablespoon of baking powder, use 1 teaspoon of baking soda, mixed in with 2 teaspoons of cream of tartar.