Attention should be noted that the wording of the offer speaks of 2 vials for 1, but this is a mistake! It is 1 unit. After a complaint to the supplier he accepted (with some reluctance) to send me the missing vials. It was, against too late to receive them in time for the birthday of my son. Too bad.
Namely that in calculating with shipping, it is not the most profitable deals. Indeed, I found the same bottles cinquantes cents at the mall next to the office.