Abstract: A dispenser for storing and dispensing two flowable materials, preferably comprising a single piece container having a driving member, a storage member having an discharge nozzle defining two separate passages and two cylinders each communicating with a separate one of said passages and a hinged member joining the driving member and the storage member by way of living hinges, the driving member defines two pistons located and sized to sealingly engage the cylinder when the driving member and the storage member are folded about the living hinges into engagement with one another; the cylinders being isolated from one another. When squeezing force is applied the driving member and the storage member act against one another to expel the materials through the passages of the discharge nozzle for blending of the ingredients upon exit from therefrom.

Abstract: A nozzle configuration for a static mixer having a retaining shoulder with a square cross-section, an inclined front face and a flat retaining face that is normal to the longitudinal axis of the nozzle. An undercut having a octagonal cross-section is provided immediately adjacent to the retaining face. The faces of the undercut alternately define access surfaces, that are in the same plane as and join with corresponding outer edges of the retaining shoulder, and locking surfaces that undercut the corners of the retaining shoulder for retaining a locking hub on the nozzle. Travelling clockwise around the undercut, each locking face is inclined relative to the preceding access face at an angle of 40.degree. such that it is harder to unlock a locking hub in the clockwise direction than it is to lock it.