Custom Moldable Bleaching Trays are essential to the dental whitening process. Our  ThermoForm Bleaching Trays are custom moldable in order to give your teeth the perfect fit. If you do not have custom moldable bleaching trays, your whitening efforts could lead to uneven whitening (zebra teeth), excessive sensitivities, and you may need up to four times as much whitening gel to get the job done.  Our ThermoForm Bleaching Trays are so moldable and soft that many people think that they are as comfortable as expensive, lab-created bleaching trays.