For my game at least, I noticed that the nuka cherry, grape and ice cold grape can sometimes appear to have an ugly glow or fake reflection. It seems like a bug, because Ice cold nuka cherry does not have this issue like regular nuka cherry does. This glow is not apparent at all hours of the day and can also depend on if you are outside or inside. If you notice a similar issue this fix might be for you. What I did is make a small FO4edit patch that changes the .nif assignments for nuka cherry and nuka grape to use the same .nif used by ice cold nuka cherry and regular nuka cola. If you notice any other colas that have this problem let me know, although quartz, quantum and several crafted colas are supposed to glow. Grape visual fix requires Nuka World DLC.

There is now a DLC cola leveled list integration option that will insert DLC colas (Nuka world cola + craft cola and vim colas) into leveled lists that drop vanilla colas. Can be found in vending machines, containers, vault tech lunch boxes, vendors and enemy loot. You probably won't see the colas until leveled lists reset in your game and they are rarer than vanilla colas and empty bottles. The best way to find DLC colas is in vending machines. You will not find vim or nuka craft colas in nuka cola vending machines, they are found only as loot. Available with or without the cherry/grape visual fix. Requires Far Harbor and Nuka World DLC. 

 Manual Download Instructions: Go to... 
Program Files-->Steam-->Steam Apps-->Common-->Fallout 4---> and drop the .esp in the data folder.