* Cigarette smoking
* Drinking coffee
* Tea
* Sport and energy drinks
* Red wine
* Colored soda
* Juices
* Foods that have tomato sauces
KöR’s Dual-Activated, Tri-Barrel Hydremide Peroxide formulation and delivery system is the first and only whitening system to utilize a unique tri-barrel configuration instead of the typical dual barrel system. This allows the peroxide chemicals to be kept separate until ready for use at the time of the appointment, thereby significantly improving the effectiveness of the gels.