“The “Safety Plug” allows a bottle containing a fluid product to be secured right at the assembly plant. The fluid may be a liquid or a gas. This ensures the bottle is transported from the factory to the wholesaler, retailer, and finally to the customer in complete safety, without concern for potential fluid theft.
Once secured, anyone attempting to access the fluid must break the tabs containing the arrows on elements A and B. Anyone noticing a broken tab can deduce that the bottle has been tampered with and that fluid has likely been stolen during transport.”
The assembly is made of two components:

This is the upper component of the assembly and is made of a pyramidal housing on one end.

This is the lower component of the assembly. It is made of a pyramidal shaped rod that is forced fit into the housing of the upper component.

To lock the two parts together, the rod of element B fits into the opening of element A

The pyramidal housing and the rod have different angles that generate friction during installation. Forcing the rod into the housing creates a tight interference fit