Durable frisbee

Stella loves her frisbees. So much so that they get chewed up rather quickly. I stopped using the cheap plastic ones because she not only destroyed them in one short play session but occasionally her mouth would bleed and I didn't like that. I've been getting the "toy r us" brand frisbees at Petsmart. They typically last a good deal longer than the plastic ones but if she's really enthusiastic she can destroy them quickly too. Anyone have any suggestions of good, sturdy frisbees (or frisbee-like toys)? Thanks