It is flexible and hold so far so good
Great product... The package includes several sizes; they take the place of plastic wrap covering dishes, fruits, or vegetables that are round. They're stretchy and easy to use, and I think work better than plastic wrap for keeping foods. Easy to wash... I'm expecting they will last. And I understand that silicone is a better choice than plastic in terms of both health and environment.
I'm tired of using disposable plastic wrap, and my sister has some silicone lids like this. These work great on glass and ceramic. We have several little bowls that we lost the plastic tops for. It's also great for converting regular dinnerware bowls and cups to storage, because these stretch and you have different sizes. You must dry off the lip so that the silicone grips it and stays sealed. But the stretchy silicone rubber does a great job. I just wish I had more large sizes and oval size to fit my mixing bowls and my big Pyrex measuring bowl with handle. Consider making ones to fit these!
These are great!! They allow you to seal things without using plastic wrap. Since these are washable and reusable, you don't need to use plastic wrap. This is a great way to seal things but not have to worry about wasting and throwing away plastic all the time. They come in a variety of sizes so they work for most bowls. They are for the most part leak proof. These are almost perfect. I have only one slight complaint. They aren't the greatest to wash. They fit in the dishwasher funny, but if you handwash most things these should wash nicely.