I bought a basic firesafe - like a concrete briefcase. I think its rated to protect paper documents for 20 minutes in a fire. I'm not concerned about theft or fire, I just wanted to make sure I wouldn't lose important documents. This is heft and hard to misplace, so I have no concern about my passport wandering off.
What do you mean by "robust"? Protection against burglers? Fire-resistance? Cool-looking lock system?
