A packaging and applicator kit may include: a first receptacle containing a first substance; a second receptacle containing a second substance that is different from the first substance; and, an applicator to which both receptacles can be secured. The applicator may include at least an elongate portion that is capable of extending in one of the first and second receptacles and includes a through channel enabling the substance contained in one of the first and second receptacles to flow for mixing with the substance contained in the other of the first and second receptacles.