A french website NoWhereElse claimed that they have received the alleged drawings of iPhone 7's casing. The images provided were neither endorsed or verified with Apple.
Nevertheless, the leaked images show a new redesigned rear case of the iPhone 7. Reportedly, Apple built a new smart material that would get rid of the rubber strips. The rear case also hints a camera upgrade. Also, the case does not hold the rubber-like antenna bands that are there on iPhone 6 series.