a portable and rechargeable packaging unit for a product such as mascara includes an applicator and a reservoir provided with at least one wiper . the applicator has a handle and at least one tuft of bristles implanted parallel to the median plane of this handle , these bristles being of a specific shape and length and capable of applying mascara to keratinous fibers , and in particular to eyelashes . the reservoir has a length substantially equal to that of the bristles of the applicator .