Below is a picture of the worlds most pimpin' Firefly bag ever. The picture on the bag is comprised of Jayne quotes, and yes, you can read them. The buttons around the bag are kind of hard to read via the pic, but they are pimpin' in real life.
I will go from Left strap around the bag, and then end on the Right Strap:
Property of Transport Ship Firefly Serenity If Found Return Contents to Jayne Cobb
If Wishes Were Horses We'd All Be Eating Steak
I Think You Have A Problem With Your Brain Being Missing
I'd Rather Be In Jayne's Bunk
(Doesn't read anything, but it is a black market beagle)
I
heart Captain Tightpants
Trekkies pretend to be Klingons.
Star Wars Fans pretend to be Jedi.
Fans of Firefly ARE Browncoats.
Livin' Ledged Needs Eggs.
Dong Ma
Bout As Deceiving as a low down dirty... Deceiver
Your Mouth is talking, might want to look to that
Chain of Command (Do I really need to type out what that says?
Ah, curse your sudden but inevitable betrayal!
FYI- You can get all of this wonderful stuff and more on the shinyest site, Cafepress.com. They will print you up whatever you want, and it will be at your door in like... I think it was four days, or something crazy like that. Ok, it was for me because A) I live in the US, and B) You don't mess with Ed...