Bottle top closure

Claim 1

In combination, a bottle and bottle cap, said bottle having a mouth defined by an annular upwardly extending lip portion, said lip portion having an inner and outer cylindrical surface and a top surface extending between said inner and outer cylindrical surfaces, said bottle having a shoulder surface flaring outwardly from the lowest point of said outer cylindrical surface and terminating at its radially outward extent at a tread point, said bottle having a lock surface extending radially inward from said tread point, said bottle cap having a top portion for covering the mouth of said bottle and inner and outer rings extending downwardly from said top portion to outermost points, said inner and outer rings being spaced at said top portion a distance slightly greater than the distance between said inner and outer cylindrical surfaces of said bottle thereby defining with said top portion a groove to receive said lip of said bottle, said outer ring extending generally perpendicularly downward from said top portion and said inner ring extending angularly from said top portion toward said outer ring so that said inner and outer rings are spaced at their lowermost points a distance slightly less than the distance between said inner and outer cylindrical surfaces so that said lip portion of said bottle is engaged by said inner and outer rings when positioned in said groove, said inner ring including a resilient member substantially thinner than said outer ring movable toward and away from said outer ring and having bead means at its lower end facing said outer ring to aid in receiving and holding said lip of said bottle in said groove, said outer ring of said bottle cap having a flaring inner surface for engaging said shoulder surface of said bottle and terminating at its lowest extent with a hook portion, said hook portion lying below said lock surface engaging said tread point of said bottle and having a plurality of spaced notches therein extending partially therethrough thereby defining weakened areas in said outer ring so that when said bottle cap is removed from said bottle and said ring will tear at at least one of said weakened areas.