WHITE PLAINS, N.Y. — Skin care is hot, but Dairyface is cool — so cool that it lives in the fridge. Dairyface is a new line of yogurt-based products that incorporate the nutritional benefits of milk to nourish skin cells. It remains fresh in the refrigerator through a clearly indicated expiration date and is full of prebiotics and probiotics for the skin. The Dairyface collection includes five facial refreshers that are designed to be applied like a topical mask treatment. Each package contains two single-serving treatments for the suggested retail price of $19.95.