Package with replaceable inner receptacle having large integrally molded fitment

A replaceable inner receptacle for use in an outer bottle having a finish portion wherein the replaceable inner receptacle comprises a single integral piece flexible bag adapted to contain a fluid product and including:

• a. a thin walled lower half portion having a thickness small enough that the thin walled portion readily collapses after being radially deflected under an externally supplied squeeze force;
• b. a thick walled upper half portion having a thickness great enough to be resiliently deformable such that after being radially deflected under an externally supplied squeeze force, the upper portion of the flexible bag returns substantially to its original shape;
• and
• c. a rigid fitment portion having a fluid passage therethrough providing fluid communication with the interior of the flexible bag and including a flange having an overall dimension greater than both the upper and lower walled of the walled portion of the flexible bag, and the periphery of the flange being adapted to rest against the finish portion of the outer bottle;
• wherein the thin walled half portion of the flexible bag inverts inside the thick walled upper portion of the flexible bag enabling substantially all of the fluid product within the flexible bag to be dispensed.