Summer in a Bottle N.Y.M.P.H promises to give you flawless summer skin that feels smooth and hydrated - without streaks or harsh lines. The water-based formula melts seamlessly into the skin to help blur imperfections, leaving you with nothing but a sun-touched shimmer that is both water and transfer resistant. N.Y.M.P.H promises to give you flawless summer skin that feels smooth and hydrated - without streaks or harsh lines. The water-based formula melts seamlessly into the skin to help blur imperfections, leaving you with nothing but a sun-touched shimmer that is both water and transfer resistant.