* The sugar can be replaced with artificial sweeteners for a diet drink. The opensoda.org formula from 2009 calls for replacement with Splenda at ⅛ the mass of the original sugar amount. * Try measuring the flavoring oils with an eyedropper. * Alcohol can be used to aid with mixing the flavoring. Cube-cola instead uses a kitchen whisk attached to power tools. * Use only food-grade flavoring oils.