IVG Concentrate Cola flavoured concentrate gives the familiar dark and aromatic flavour of refreshing cola. Cola IVG flavour concentrate is perfect on its own or as a mixer for fruit and beverage recipes. The cola flavour is refreshing, so it holds up well when used as a standalone. Cola IVG really comes into its own as an ingredient in a DIY recipe. It mixes well with cherry, lime or beverages such as rum or whisky flavours. IVG concentrates have been blended for you to use as standalone flavours in DIY e-liquid. You could also try blending them with other fruity flavours.