of the cost. Comfort mouth tray Most of the kits available on the market use the warm & form mouth trays. If you have ever used these you will know that you have to put them in boiling water, then put them in your mouth and suck so that the melting White Light Smile silicone forms a mold around your teeth. There are some problems with this, the trays are obviously quite hot which can lead to lips and gums burnings, it also makes them very difficult and painful to use if you have sensitive teeth. 00 mouth trays are the
