Well the bag the dog food comes in anyway.
I reuse 30lb dog food bags as trash bags. They make excellent trash bags because they are heavy duty and the paper inside is waxed. I drink soda like most people drink water so the waxed paper inside keeps any spillage, yeah right, under control. I keep one bag for trash and one for recycled cans, we have a 5¢ deposit on cans.
The bags last a very long time. My dog hasn’t eaten puppy food for quite some time now. lol
-- Chunk's Workshop pictures: http://spadfest.rcspads.com/thumbnails.php?album=135