Covingham Cosmetics mobile teeth whitening spa offers a first class teeth Whitening service that is both convenient and cost effective. Prices start from £44.50 per person when two people book together. A full whitening session takes an hour for each person and the setting up and packing away of the equipment takes around 30 minutes. You can expect your teeth to be between 6 to 16 shades whiter depending on your age and lifestyle with the average being 12 shades whiter. You could easily pay anywhere between £99 to £149 for this level of teeth whitening but right now you and friend or family member can have your teeth whitened for less than £45 per person.