These companies provide a free teeth whitening sample. They claim this the free sample are professional whitening products. They offer to send you free samples and you only have to pay the shipping and handling price. They clain that if you use these products together, you will get ultimate teeth whitening experience w/o having to pay the extremely hihg costs of going to dentist. When you submit your credit card info, they do not give you a confirmation number. They send you the free samples (which look tampered with) then continue to charge... read full review »