Great idea, but with vulnerabilities

The idea with the covers makes me happy, but my one of the lid is the same time broken.
The plastic can not stand the cold. What gives the breaking remedy if you briefly rinses all containers underwater.
Then the lid can be removed without damage and the ice in the form also breaks equally beautiful on :)

Four Stars, because here you only need to learn from the mistakes of the tip to keep the form previously under water should be printed on the package insert.