It all depends on how often you use it :)
With an application equivalent to a nut of shower gel once a day, the product will last about 1 month and a half for a single adult.
Concerning the shampoo which is used less often, count about 3 months. It is obviously variable according to the length of your hair...
As for the intimate gel which is used in less quantity, it will last you nearly 4 months!