Tablet holder

On the coach my tablet is not easy to hold, it slips away....and some times I drop it..... so I need an easy comfy holder, one that does not gives me a cramp..when I watch a movie. It can also be used as a (2 sides) stand or a loader It is designed for my tablet a samsung tab 2, but I think it could made to fit every tablet... if you change de height.......