bun·ker (b¾ng“k…r) n. 1.a. A bin or tank especially for fuel storage, as on a ship. b. Often bunkers. Fuel, such as coal or fuel oil, used especially in ships.[American Heritage]

containment = 3. A structure or system designed to prevent the accidental release of radioactive materials from a reactor. [American Heritage]

Oakley's alchemy includes advances once thought impossible. They were, until now. Four years in the making,X MetalTMis a family of eyewear named for a unique, proprietary blend of metals. Utilizing a process called NetShape Metallurgy, X Metal is engineered at such extreme temperatures and power that a detonation containment bunker is required.

Oakley X Metal Romeo ($250)
To make these frames, Oakley uses a “detonation containment bunker” and a six-ton generator to blend metals at 3,600 degrees. The result: unbreakable psycho-looking frames perfect for summiting McKinley or robbing a bank with a dentist?s drill.

http://www.google.com.br/search?q=cache:rjiipZpk7b8C:media.c...

Shot glasses: The only damage the BBs seemed to inflict was a nearly imperceptible dent in one lens. But the nick actually wiped off!
http://www.maximonline.com/articles/article_3209.html