Dental floss by My White Secret, Contains two charcoal dental floss refills, Helps remove food remnants in hard-to-reach places, Use after brushing your teeth, Biodegradable floss and packaging, Floss dispenser sold separately. If you?re after a whitening regime that isn?t harsh on your teeth, My White Secret is the brand for you. Developed with the help of experts in dental care, natural ingredients are at the heart of its non-peroxide formulas. Too good to be true? Give them a go with our edit of the brand?s toothpastes, whitening strips, powders and more.