Seriously, though... I find that about 20-25# fit into a five-gallon bucket. I'd think that a 2-gallon bucket would likely fit 10#, or at least be very close to fitting.
goto your local Kroger, Giant Eagle or whatever grocery store. Ask at the bakery counter for any used icing buckets. They may not have some but wait for the weekend when all the little buggers have birthday cakes. Clean out the buckets and blamo instant food safe grain bucket with lid