Roll-on application with frangible cap

A single use roll-on applicator for a liquid or pasty cosmetic or pharmaceutical product comprising a tubular body having a closed end and an applicator end, said applicator end having an interior surface engaging a portion of a spherical ball, said interior surface having an inner edge and an outer portion, said interior surface being curved to complement the surface of said ball engaged therewith, said interior surface having a movable rib located at said inner edge of said interior surface to allow insertion of said ball, said outer portion being substantially cylindrical and having an external surface defining an integrally formed cap for said applicator, said external surface including a peripheral line of reduced thickness for facilitating separation of said cap from said tubular body, said curved interior surface being dimensioned to allow said ball to project beyond said peripheral line, said cap including a small rectangular bar extending outwardly of said tubular body.