Iwhite instant is an easy to use dental safe and instant teeth whitening product this at home treatment should be worn for only 20 minutes a day for instant results up to 8 shades whiter the product can be used for 5 consecutive days for even more astonishing results or you can use it once in a while whenever you feel it is necessary the one size fits all trays are pre filled with active gel and hygienically packed iwhite gives instant whitening and actively removes stains thanks to the u