My cats are into destroying my cork coasters. I bought a replacement package because I thought those would stay intact, and yet they managed to destroy the second package too.
I bought a pack of cork hot pads (like coasters, but a whole lot bigger) - they all ended up being cat toys.... my male cat loves, loves, loves to use them as scratchers. They are kind of messy though...
"Sharing the road means getting along, not getting ahead" - 1994 Washington State Driver's Guide