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 that was invented shortly before the Great War but never mass produced. It was said to not have as much kick as Nuka-Cola, but made up for that with its clear appearance.

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 development, 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.
 * After getting the formula, head to the Red Racer Factory, northeast of the Nuka-Cola Plant, where you will be met by Goalie Ledoux and the remaining members of his faction, Sudden-Death Overtime (you'll find the corpse of one of his teammates elsewhere in the Nuka-Cola Plant). He will offer you 250 caps for the formula or 400 caps if you pass the speech check. You may also choose to "face-off", resulting in the group turning hostile, allowing you to keep the formula for yourself for collection value.
 * You can however talk him to pay the 400 caps and afterwards kill him and his crew without loss of karma. Also you can take the formula again - so that you will have two in possession (maybe only one if you are carrying it with you).

Related quests

 * The Nuka-Cola Challenge (Just for the Taste of It is only available during aforementioned quest)

Behind the scenes
Nuka-Cola Clear is a reference to Crystal Pepsi and Tab Clear.

Bugs

 * If you keep the Nuka-Cola Clear formula in My Megaton house, you can sell it to Ledoux but retain the formula. After that you can duplicate the formula by killing Ledoux and looting the formula from his body.