Lunchbox (Fallout 3)

This lunchbox was a promotional item created by Vault-Tec before the Great War and used in the company's advertisements, such as the one titled "Good Life". With the right schematics, it can be used to make Bottlecap Mines.

Trivia
The Fallout 3 Collector's Edition is packaged in a real-world Vault-Tec lunch box. See Fallout 3 promotional items.

In game some lunchboxes are located in minefield houses and in vault tech headquarters if you are looking to make some mines.