The Dr. Smiles Pop & Prime pen was created by renowned Orthodontist Dr. Jacqueline Fulop-Goodling, DMD, PC with you and your convenience in mind. It is literally a brighter smile that is no further away than a purse or desk drawer. How can that be any easier? Well now we're offering Pop & Prime Pens in packs. Use your Pop & Prime Whitening Pen as often as needed knowing you have a second or third pen waiting for you!