To make an accurate clone of Coca-Cola at home, I started with the medicinal ingredient, probably just as John did. But rather than harvesting kola nuts, we have the luxury of access to caffeine pills found in any grocery store or pharmacy. One such brand is Vivarin, but it is yellow in color with a thick coating and it tastes much too bitter. NoDoz, however, is white and less bitter, with a thinner coating. Each NoDoz tablet contains 200 milligrams of caffeine, and a 12-ounce serving Coke has 46 milligrams in it. So, if we use 8 NoDoz tablets that have been crushed into powder with a mortar and pestle (or in a bowl using the back of a spoon) we get 44 milligrams of caffeine in a 12-ounce serving, or 36 milligrams in each of the 10-ounce servings we make with this recipe.