Bottle cap

Claim 1

In combination, a container having: a container neck having an annular end with a substantially circular arcuate upper corner and a downward tapering lower curvature ending in a minimum diameter portion, an annular ring below said minimum diameter portion; and a cap of a flexible plastic material deformable to accommodate minor variations in bottle dimensions and to permit said cap to stretch over said minimum diameter portion, said cap being preformed and having substantially uniform wall thickness throughout, said cap comprising a flat top disc having a diameter about equal to that of said neck, a depending skirt extending below said minimum diameter portion, and a depending tab connected to said skirt to extend below said skirt, said skirt being weakened by a pair of score lines which are located on the outside surface of said skirt to prevent leakage from the bottle, said score lines being positioned on opposite sides of said tab and extending upwardly toward said flat top disc and diverging outwardly from each other and terminating in the skirt just above said minimum diameter portion, said skirt being tearable along said score lines to open said cap, said cap in position on said neck sealing said neck against either input or output of liquid, said cap when torn along said score lines permitting removal of said cap from said neck and ready replacement thereof on said neck to reseal said bottle.