Instruct: Classify Amazon reviews into positive or negative sentiment
Query: what the heck are these?

Ok, so I definitely agree with the other reviewers who are wondering what in the world these things are, they look more like slender airplane barf bags than vacuum bags. It's just a paper sleeve, I don't see much difference between using this and using a brown lunch bag. It seemed so ridiculous that I decided to put this thing INSIDE of the reusable one, hoping to grab at least some of the dog hair, etc. so that cleaning the other one won't be as bad.