I saw ones like the cheese balls empty in 1 and 2 gallons for $1 or $2 a piece in the house wares section of walmart. I have also seen the larger barrel shaped one with dog treats. But I quite literally would not feed my dog the crap that comes in those. Have not seen human food in them will have to look harder. Depending on the food I'd be worried about say cheese puff flavored beer... That fake cheese is pretty nasty, might hang around even after a good oxy soak. Also most of that stuff my wife would take one look at and say: "You bought that solely to use the container for beer didn't you?"
Next: Irish Red Ale, Mild, BC Pale, Scotch Ale, Helles, Pils
Planning: Bombardier clone (The real ale cask version, not that sh!te in the bottles)
P1: Chocolate Oatmeal Stout P2: Pear Wine P3: Air P4: Oxyclean
Keg 1: Stout Stout Keg 2: Dead Intruder Mailbock