Product review (5 stars): silicone, much better than metal version of other seals
These are so much better than the metal ones I had previously, because they fall snuggly in place on the counter and fit easily under the microwave, unlike rigid metal ones that I'd constantly snag on things before. No more cutting myself on the metal when I wash them, the silicone version are easier to wipe down in place because they don't slide around.