go with print100, those guys have offset (traditional, not digital) printing for very small price. You can add lot of "bling" to them too like uv spot, gold print (hot stamping) and so on.
I met a plastic surgeon that had aluminum business cards but the price was ridiculously expensive - but it was the sharpest bcard I've seen yet. In a survival situation it could probably double as a ninja weapon.
Kevin Mitnick has the coolest I've seen.
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Yes, that is a lock picking set. And, it's functional.