Incase has introduced Meta Slider ($35) and Shock Slider ($50) cases for iPhone 5. The Slider has long been a mainstay of Incase’s lineup — the most recent Slider case was released for iPhone 5 last year. Meta Slider and Shock Slider are notable for expanding the design of the Slider case. Meta Slider, available in white/gray or black/slate, is a two piece design with a microsuede cradle. It has a hardshell with a molded rubberized…