No, this isn't part of a clown costume -- this is the Face Slimmer Mouth Exercise Mouthpiece, a contraption that is supposed to help you firm and tone your facial skin and muscles.

Available at Japan Trend Shop, the Face Slimmer Mouth Exercise Mouthpiece (what a mouthful) is for women who don't want to get Botox injections or go under the knife to make their faces look trimmer. This handy little mouthpiece of silicone rubber will help you, as the site declares, create the "perfect visage," meaning it will help tighten up sagging facial skin and tone your facial muscles. You just need to pop this baby in for three minutes per day and make mouth movements -- for example, repeat vowels over and over out loud.