A BREATH OF FRESH AIR

Shampoo brands are leaking onto the toothpaste shelves and mouthwash has taken new form to freshen up the front end.Some of the changes in oral care have retailers wondering what category products belong in and how they should be merchandised. In particular, Listerine Pocket Paks, introduced in the United States in October by Pfizer Consumer Healthcare, Morris Plains, N.J., have been a strong-selling