... A minus point I must hold against then: the two inner rings / discs dissolve at my copies every now and then, because the underlying silicon inflates strangely. Then I press it firmly back and always will be a few days until the process is repeated. When I asked a shop assistant it she said, if I might have put a hot pot on it. (I'll spare me any comments thereto) Otherwise, the Coaster see after about 5 years of daily use is still quite passable, are very slippery and serve their purpose.
