Abstract: A plastic tube produced by blow molding has a main section with an essentially constant cross-section over its length, which is formed by an even number of level wall sections. The wall sections are located opposite to each other and preferably have the same width. At the front end of the main section there is a tubular opening section with a smaller diameter than that of the main section. The rear end the main section converges to an essentially straight end edge which lies in a plane extending through the central longitudinal axis of the main section and which joins two longitudinal edges of the main section to form the end edge.

Abstract: A dispenser for extruding a major portion of a first pasty material and a minor portion of a second pasty material which comprises an elongated tubular container forming a first product containing chamber opened at one end to receive a product dispensing piston and closed at the other end with a delivery head including a product delivery channel arranged parallel to the longitudinal axis of the dispenser and communicating the contents of the first product containing chamber to a discharge port, a second product containing chamber which is open at one end to the first product containing chamber and which has a connecting orifice which connects the second product containing chamber to the product delivery channel, and bearing surfaces adapted to accept a piston drawing assembly, a product dispensing piston transversely disposed in the elongated tubular container including a stop spring to restrain outward motion of the piston, and a piston drawing assembly including a shaft adapted to engage the piston stop spr