Atomic Cocktail

 is a consumable item in Fallout: New Vegas.

Characteristics
When consumed the player is resistant to fire and energy and SLP is greatly reduced (H2O is increased), but it also gives +8 to radiation.

This item is made at any campfire. It requires: Mentats (1), Nuka-Cola Victory (1), and vodka (1), which makes 4 bottles of the cocktail.

Prior to patch 1.2.0.31x, atomic cocktails required an additional 1 Nuka-Cola Victory, 1 vodka, and a bottle of wine to craft.

Locations

 * Klamath Bob's Liquor Store (2) - In wooden crate behind store counter.
 * Occasionally found on dead Legionaires.
 * Lucky 38 Presidential Suite (3) - In one of the fridges the first time you enter.
 * Whittaker Farmstead - In the fridge.
 * It seems to appear randomly in refrigerators.

Behind the Scenes
It is likely a reference to the song Atomic Cocktail by the Slim Gaillard Quartette.