Abstract: A device (1) for packaging two substances, particularly two cosmetic substances, comprising at least two bottles (3, 5) that have any given shape but are preferably substantially identical, each bottle being provided with a body defined by side walls (7) and a bottom wall (18), and comprising a neck (11) sealable with a cap (13). The device is characterized in that each bottle (3, 5) is secured to an intermediate connecting member (15, 15'). The intermediate connecting member (15) of one bottle comprises magnetic attachment means (29) engageable with the intermediate connecting member (15') secured to the other bottle, whereby the bottles (23, 5) may be releasably joined together.