Instruct: Classify an Amazon review into positive or negative sentiment.
Query: SO much happier with glass

These are great, sturdy glass flat-bottomed bowls with tight-fitting covers. At first I had a hard time getting on the covers, but I figured out the technique: You have to start at one place and seal around in a circle. I feel much safer using glass instead of plastic, and it's nice to be able to see the leftovers. I'm very happy with my purchase.