Get a second box of Teeth Whitening Strips to treat someone you love or to top up after your 2-week course. 2x Full 14 day course of Whitening Strips 2x FREE FULL SIZE Whitening Toothpaste Contains the active ingredient Hydrogen Peroxide Whitens teeth safely at home  Each Whitening Strips' box contains a full 14- day course of our whitening strips and a FREE 100ml Whitening Toothpaste. Created by dentists, both products contain the active whitening ingredient hydrogen peroxide which is clinically proven to whiten teeth. Our product whiten teeth gradually and safely at home. Our Men's Teeth Whitening Strips are made of the same classic formula but with a strip designed to fit men’s mouths.