A collapsible container for dispensing viscous materials has a bottle section with exterior screw threads and a cap element with nozzle aperture and internal, mating yet greater in density screw threads so that relative turning of the bottle section with respect to the cap section causes dispensing of material and collapsing of the bottle section into the cap element. The exterior screw threads are provided with uniformly spaced surface discontinuities. The cap element is provided with a resilient, inwardly directed tab which glides over the exterior edge of the screw threads of the bottle section as the bottle section is rotated with respect to the cap element until the tab aligns with a discontinuity thereof which causes an audible or tactile click to be sensed for ensuring uniformity and ease of exact dosing.