Abstract: A sleeve for a liquid dispenser is disclosed. The sleeve includes a sleeve body adapted to receive a liquid dispenser, the sleeve body having a first opening and a second opening and a side portion extending between the first and second openings, where the second opening has a larger diameter than the first opening, such that a liquid dispenser received through the second opening is retained by the first opening of the sleeve body. In some embodiments, the sleeve may have optional slits or cut outs. In still other embodiments, the sleeve may be coated with or may comprise antimicrobial material. Also disclosed is a liquid dispensing system having a sleeve and a pump dispenser.