Puncturable cap and piercer

A fitment assembly for a container comprising:

• a spout connected to the container and in fluid communication therewith and having a wall;
• a cap having a concentric platform having an outer peripheral surface and a first planar surface, a first annular wall extends axially away from the first planar surface and is spaced radially inwardly from the outer peripheral surface, a second annular wall extends axially away from the first planar surface and is spaced radially inwardly and is coaxially disposed with respect to the first annular wall to define an annular space therebetween, a portion of the spout wall is disposed within the annular space to attach the cap to the spout, the second annular wall having a first outer surface in contact with a portion of the spout wall and a first inner surface defining a circumferential depression radially inwardly therefrom;
• and
• a piercer having a tubular body with opposed first and second ends and a fluid pathway therethrough, the tubular body having a piercing member at the first end and a fluid outlet at the second end, a circumferential flange extends radially outwardly from the tubular body from an intermediate portion thereof and having a second inner surface and a second outer surface, an annular skirt extends axially downwardly from the second inner surface of the circumferential flange and has a third outer surface in surface contact with the first inner surface of the second annular wall to form an interference fit therewith to connect the piercer to the cap.