Souvenir company RAKKI in Yamaguchi sells interesting iPhone goods. t is iPhone cover made by a SENBEI(煎餅:rice cracker). They sell this as an edible survival rice cracker in emergency.
All rice crackers are made with manual labor by craftsmen, and there are the hole for cameras. However, it have a problem. It is very difficult to attach it to iPhone, and Possibility to fail is 76%.