An object of the present invention is to provide a method of producing intestinal cells by use of pluripotent stem cells as a starting material. The body has an inlet end adapted for insertion into an associated spout and an outlet end for discharging fluid that enters the first flow passage from the inlet end. The second signal processing circuit is coupled to the first signal processing circuit. The displayed text is written in a markup language and contains hyperlinks which link the current topic with other related topics. The barrel holder body comprises opposing arms made of a flexible material forming a cylindrical cavity with an opening configured to receive a first section of a barrel of a firearm.