These lids can be very difficult to get off. If you have a hot item like a baked apple in it (and this cup is the perfect size for a large baked apple---thus the two stars), along with the apple's hot juices, beware and good luck! When coupled with the knowledge Pyrex is now made by another company and their items are exploding on their cutomers, well, I am tied up in knots until this item is back on its shelf (assuming they don't explode when sitting still in the dark :-| )