when you get your teeth whiten with the chemical whitening (not sure what you call it) it is 300 pounds.. though for 24 hours no wine coffee, tea or smoking after it... they also give you a maintance pack.. it is a good job... though the gum shields in the maintance pack are a nightmare... the treatment is ok though not advisable to go with a cold as I did lol.. your there for a while and it does look great when done...xx