How do you wrap your cube's packs?

I'm looking for a clean, reusable method of storing randomized 15-card packs. Something that vaguely mimics retail packaging would be nice. I want the packs to be distinctly separate and the cards within to be concealed.

If anyone here has ever played Sheriff of Nottingham, think the smuggling bags from that game. Except more durable and able to hold 15 double-sleeved magic cards.

Does anyone here use something like this (and have a source for it)? Or at least a good alternative way to keep packs?