Nuka-Cola Clear formula

The Nuka-Cola Clear Formula  is a quest item in Fallout 3.

Background
The formula describes how to make Nuka-Cola Clear, a type of Nuka-Cola invented shortly before the Great War but never mass-produced.

Locations

 * The formula is located in the R&D section in the safe on the wall of the Nuka-Cola Plant. R&D is research and developement, and is located in the first area to the left, after entering the plant. You must get the key for the safe from Milo, Shipping Foreman.

Related quests

 * The Nuka-Cola Challenge (optional objective "Just for the taste of it")

Behind the scenes
This is most likely a reference to Crystal Pepsi or Tab Clear which was released but was never popular. They were clear or "uncolored" versions of the soda that had the same taste but simply see through. The drinks never caught on and were soon discontinued, though frequently mentioned or parodied in popular culture.