Removable attachment system

A fastener system for releasably fastening a dispenser member on a reservoir neck, the fastener system comprising:

• the dispenser member
• a fastener ring including both reception means for receiving the dispenser member, and fastener means that are suitable for coming into engagement with the reservoir neck, the fastener means including a plurality of flexible axial tabs that are suitable for fastening around the reservoir neck, the axial tabs being separated by a plurality of axial slots;
• and
• a locking sleeve that is engaged around the fastener ring so as to lock the axial tabs in engagement around the reservoir neck;
• the locking sleeve forms a plurality of locking sectors for coming into engagement with the axial tabs so as to lock the axial tabs around the reservoir neck, and a plurality of non-locking sectors not in contact with the fastener ring, the locking sleeve being movable about the fastener ring between an assembled position in which the locking sectors are in engagement with the axial tabs and the non-locking sectors are situated at the axial slots, and a disassembly position in which the locking sectors are situated at the axial slots and the non-locking sectors are situated at the axial tabs so as to enable the axial tabs to deform outwardly and disengage from the reservoir neck.