Review (1/5): A Scam - PLEASE READ
If you are reading this, good. This is a scam. They messed up production but are selling this useless junk anyway. Let me explain.
As you can tell from the picture, the white part on Top should be soft and be able to be molded to your teeth and the blue part should hold the tray in place while being molded. Instead, the white part on top is hard and can't fit anyone's teeth and the blue part on the bottom is soft and becomes pliable when put in boiling water. The result is a slightly dented blue tray holder and no permanent impression.
This is useless and there is no way they don't know that some manufacturer messed up their product and made it unsellable.
The fact that they are selling it anyway is fraud.