Abstract: A plastic bottle equipped with a tamperproof device after its opening comprises a neck (1) and a cap (2) with corresponding screw threads (3, 4). The cap (2) is provided in its skirt (6) with at least one slide (22) and one pin (8) manually sliding into the slide (22). Below its screw threads (3) the cap (2) has a nut ring (9) that is provided with a plurality of holes (10); one of these is intended to receive and hold an arrow-tip end (18) of the pin (8) until its breakage in its weakened tract (17) when the cap (2) is unscrewed for opening. In addition, the pin (8) has an elongated projection (13) for its manual sliding inside the cutout (12) in a convex band (7) whose interior contains the slide (22) of the pin (8). The cutout has a lower end working as a stop for the pin (8).

Abstract: A plastic bottle equipped with a tamperproof device after its opening comprises a neck (1) and a cap (2) with corresponding screw threads (3, 4). The cap (2) is provided in its skirt (6) with at least one slide and one pin (8) manually sliding into the slide. Below its screw threads (3) the cap (2) has a nut ring (9) that is provided with a plurality of holes (10); one of these is intended to receive and hold an arrow-tip end (18) of the pin (8) until its breakage in its weakened tract (17) when the cap (2) is unscrewed for opening. In addition, the pin (8) has an elongated projection (13) for its manual sliding inside the cutout (12) in a convex band (7) whose interior contains the slide of the pin (8). The cutout has a lower end working as a stop for the pin (8).