My cat LOVES the thick plastic. Loves loves loves it. I think he likes the sensation of puncturing his teeth through it. He gets so into it that he'll chew the air long after the plastic is out of his mouth.
And yeah, it's only the thick plastic. I bring it to him as a treat.
If I buy myself flowers, I give him the plastic they are wrapped in (that's his favorite).
Biting the plastic doesn't get on my nerves, so I haven't done anything about that. But he also likes biting through the thick leaves of my plants (Janet Craigs, corn plant, lady palm). So for that we've tried both NaturVet Bitter Yuck and Grannick's bitter apple.
We like the Bitter Yuck the best - it's water-based & potent. I only respray it on the plants every few months. Plus, the label says its safe for furniture, drapes, paws, tails, wounds, bandages, etc. (I can say I've gotten it on my carpet unintentionally & the carpet isn't discolored or anything) The Bitter Apple is Isopropanol-based (a chemical commonly used as a disinfectant, antifreeze, and solvent), and killed my plants (where ever the spray touched - the plants died). On the bottle, it states "may stain surfaces."
Note: after you spray them, wash your hands. I have tasted bitter yuck WAY too many times
If you really want the bitter apple stuff rather than Bitter Yuck, I'm happy to send you two bottles of grannicks bitter apple we have sitting around - one 8 fluid oz & one 16 oz bottle still wrapped in plastic. I haven't touched them since they killed the plants.