IRIS USA, Inc. 65 Quart Airtight Pet Food Container, Gray (500087)

Can you store flour in it?

Are the 10-pound containers stackable? Thank you!

I realize that this is a 10-pound container but will this hold 17 lbs of dry CAT food, not DOG food, since the cat food morsel's are so much smaller?

What are the dimensions on the 10# bin? width, depth, height? Can't find this info on the site.