As a less than dependable rule, they're just pre- wrapped plastic shells that in light of current conditions fit over your teeth. A few units highlight thermoplastic "air stash and eat" plate. With these, you smooth them Blizzard White up in high temp water and after that squish them over your True Brilliance Teeth Blizzard Whitening Pento change their fit. (See picture underneath.) You don't as a have any kind of
