Just to update everyone… Apparently one box of Latisse is good for 2 months. I bet you can stretch it for 3 months. Cost for 2 months would be $60.00 and 3 months would $40.00. Now, that is more reasonable. I have a tube of RevitaLash that has lasted for several months. Though, I find that I do not apply it nightly as suggested for best results. RevitaLash retails for $130.00 but you can buy it for less on line or at trade shows for cost.