I was skeptical about spending this much for a costume prop but these were totally worth it. The thermoplastic can be molded and remolded as much as necessary, Make sure to read the instructions before applying. The trick is sweeping the plastic back and flush with your teeth for a secure hold. I t took me a few shots to get a clean result but once I did they snap in and out super easy and I don't worry about them falling out. I might not suggest eating with them in but drinking should be just fine . Ladies, you should get the smaller "Sexy Bites" for a more comfortable fit with less lisp. My lisp is minor but present because I bought a pair a bit too big for my mouth but that was my fault not the product's. I can close my mouth completely and have no trouble wearing them for extended periods.