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I'd call the Otterbox Zippo Cargo Case overkill, except for two niggling points: first, it's cheap (just $13), and secondly, it's gotten Department of Transportation approval for checked luggage, which means you can actually take your lighter with you on trips. If you've got to have a Zippo no matter where you go, it might be worth the trouble (not to mention how useful it'd be on camping trips and the like).

Zippo Cargo Case [Uncrate]