Image: OnePlus Apparently OnePlus is turning its habit of releasing concept phones every winter into a tradition. Following last year’s Concept One, OnePlus has just revealed the OnePlus 8T Concept. Advertisement Sporting what looks like tiny pools of water on its back, the OP8T Concept is quite a departure from both the standard model and last year’s leather-backed prototype device. Inspired by the Turkish hot springs of Pamukkale, these little pools actually contain a color-changing film that uses embedded metal oxides to change colors depending on the amount of electric current running through them. This allows the color of the film on the OP8T concept to change from silver to blue at a moment’s notice.