The US Bill of Rights printed on pocket sized bits of metal.

Why?

‘The next time you travel by air, take the Security Edition of the Bill of Rights along with you. When asked to empty your pockets, proudly toss the Bill of Rights in the plastic bin.

You need to get used to offering up the bill of rights for inspection and government workers need to get used to deciding if you’ll be allowed to keep the Bill of Rights with you when you travel.’