A sustained duration non-aerosol mechanical sprayer includes a spray head which is screwed onto the top of a bottle. The inner cladding is doped with a photosensitive material like germanium. The first extending portion, which has an open cross sectional structure and through which a drive shaft is passed, is made to have larger outer diameter than the second extending portion, which has a closed cross sectional structure. This helix can be cut from a single disc of material and can be supported in a variety of ways from a base.