good for stretching facial muscles

I do not believe this thing would slim your face at all, but that's not why I bought it. I have a really hard time remembering not to clench my jaw, and when I wear a mouth guard, it just makes me clench my jaw in a different position. This thing, while embarrassing and ridiculous, makes it impossible to clench your jaw and gives all those muscles a little break. Do not try in front of others.

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