Sears has a 13" tool bag on sale for $4... a real bargoon.
Craftsman 13" Tool Bag $4 + Free store pick-up - Sears.com Deals, Coupons and Promos
Personally, I would only use the fix-a-flat in an extreme emergency, like if you get a flat in a not so nice neighborhood in middle of the night. The crap in them is probably a ***** to get off your wheel.