http://www.surplusandadventure.com/images/product/main/ammo_box_30.jpg
I use one of these, I have modified it to be mounted into my truck. its bolted to the floor, and i have mounted a lock arm to it that keeps it from being opened when locked. it works great when i have stuff (wallet, phone, money, etc) i want to keep locked up in the car just toss it in there, lock it up and don't have to worry about it. Even if my truck gets broken into they're not getting the important stuff unless they take the whole truck. If that happens then I'm sure I'll have bigger things to worry about.