Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Excellent Product

These plastic caps make old fashioned canning jars water tight and allow me to use glass jars to store leftovers in the fridge and grains in the freezer. I also use them to store different types of dry beans, pasta and popcorn - they look very nice. These lids fit all sizes of wide mouth canning jars. It is much healthier to store foods in glass rather than plastic and I like that the footprint is small and that I can see at a glance what is in the jar.