Synthetic resin filler cap

摘要

The bottle cap unit (1) of this invention comprises an inner cap (2), which is tightly fitted to the bottleneck (24) to form a pour spout, and an outer cap (15) , which is detachably screwed on or off the inner cap (2) to close or open the pour spout. The first locking part (5) is disposed on the outer wall of the attaching cylinder (3) of the inner cap (2). The second locking part (23) is disposed on the locking cylinder (22), which is connected to the outer cylinder (20) of the outer cap (15) via the breaking pieces (21). This second locking part (23) is engaged from underside with the first locking part (5) to lock the outer cap (15). The attachment of the inner cap (2) to the bottleneck (24) is set at such a strength that allows the inner cap (2) to be manually snapped out of the bottleneck (24). In this configuration, the bottle cap unit (1) can be easily snapped out of the bottleneck (24) for separate collection.