Rembrandt Oral Care Products, Santa Maria, CA, introduced Rembrand NightTime Whitening. A sponge stylus applicator turns with a click, self-dispensing the correct amount of gel. When applied to the teeth, it forms a paste-like mask, company executives said. The gel dissolves overnight and can be used alone or in combination with other Rembrandt products. It retails in drug stores, pharmacies, supermarkets and mass merchandisers for $14.95.