These are just as it say, easy and grab and go.  I used it for baking, and cooking -- let it cool.  Caped the top. Refrigerated overnight.  Then hopped in car to next destination.  In the oven  and on the table.  Awesome!

From oven, refridge to oven and display/serve.
wished they had some deeper -- and a bit wider.  WIth more colored tops.  A place to label item with date.  ? Freezer ?