I regret watching this vulgar, preachy piece of trash. It replaces wit with the word Fuck, and displaces comedic timing with repetition. Did you like that joke? Cool, man, 'cuz you're going to see it 8 more times. The premise and the analogy are squandered away by unskilled story telling practices. As this review mentions, it tells instead of shows, and yet it fails to even tell in an interesting manner. The writing is lazy and inconsistent. The art style is ugly and the animation half-baked. The movie can't even stick to its premise well. Inanimate objects, in addition to food, become sentient. Packaging for some food is not sentient, whereas for other food it is. The religious analogy falls apart with Barry, who doesn't represent any group of people. The movie attempts to secure laughter through over-the-top obscenity, the kind of humor best enjoyed by shut-ins repressed by their parents, who think excessive use of the word Fuck, and open portrayals of intercourse are edgy, and a worthwhile expression in their own right.
The only good things about the movie is that it sticks to a simple, well defined three act structure so that the juvenile that like this kind of filth can follow along, though any parent who lets their child see this is grossly negligent, and it creatively managed to fit bath salts into the plot in an unexpected way.
Instead of shelling out money to see Sausage party, I would advise you to re-watch The Lego Movie. It's less expensive, and an infinitely more hilarious cartoon than this piece of garbage.