This is from a conversation on the old forum:
If you enjoy baking and hate having to scrape baking trays, try a flexible non-stick baking mat or silpat. To use it, unroll the silpat and place it over a baking sheet. Place your cookies or pastries on top and bake it in the oven as you normally would. After baking, remove the mat. Clean it with soap and water as needed. Roll it up and store it away.
The mat can withstand temperatures of up to 580 degrees. It can be used roughly 3000 times before it needs to be replaced.
Depending upon where you buy these, silpats cost anywhere between $18 and $30.