Couleur is the least expensive case of this group, but it also feels cheap. Instead of thick, rich materials, its covers are made of a thin and obviously imitation leather. We do like the color options, though, and the fact that a screen protector is included with each. Instead of a plastic shell or frame, Uniq chose to use four curled corners to hold the iPhone 5 in place. They’re quite tight so you shouldn’t fear that the phone will…