Since the creation of N°5, Chanel has practiced the art of baudruchage to seal bottles of parfum. Performed entirely by hand, the technique consists of placing a fine membrane over the neck of the bottle and holding it in place with two rows of pearl-cotton thread. It is then closed with a wax seal. From this moment, a pact of exclusiveness is sealed: the bottle can only be opened by the woman for whom it is destined.