Features:

• The versatility of Pyrex glassware extends to storage dishes in an array of convenient.
• Stackable sizes with plastic lids for safe-keeping.
• Perfect for reheating and serving.
• Resistant to both heat and cold.
• Compared to the plastic counterparts, Pyrex glassware storage dishes do not stain or retain food colors, tastes or oders.

Rating : - Good product; horrible price
As others have mentioned, these storage containers are very good, if a bit smaller than would be ideal. But the pricing is ridiculous. I bought them from Target via Amazon. With shipping, they cost just over $21, which seemed like an OK deal given that the list price is $24.99. A few weeks later I was in my local Target store, though, and saw that the everyday in-store price is just over $12! I guess in theory they could be listed for $24.99, but at your local Target, they cost only half that. So unless you are spending enough that your shipping from Target will be free, buy them in a store, not online, if you possibly can.