Not sure about using a cigar box, as they keep whatevers inside relatively humid - and I think that might destroy the kif.
You want a box thats about an inch deep made of pine (lots of kif boxes are made of this) with a groove cut into the wood so that a screen can slide snugly into it without coming loose. You want a closing lid aswell with some sort of DURABLE, STRONG latch to keep the lid on while you are kiefing the bud.
Basically, Ive just nicked the idea from here http://www.everyonedoesit.com/online...ProductID=2362