Dispensing structure incorporating a valve-containing fitment for mounting to a container and a package with a dispensing structure

A package comprising:

• a collapsible pouch defined by at least two, opposing, flexible web portions that are sealed together adjacent an interior region which is unsealed and that are separated at a peripheral region to define an opening to the interior region;
• a fitment defining a dispensing passage and having a hollow base that has two lateral ends and that defines two generally oppositely facing walls which converge and terminate at each of said two lateral ends, each said wall defining an exterior surface portion sealingly secured to one of said web portions along said opening, said fitment hollow base defining at least a portion of said dispensing passage through said fitment, said fitment including a spout that (A) extends from said hollow base, and (B) defines at least a portion of said dispensing passage;
• a flexible valve that (A) is disposed within said hollow fitment across said fitment dispensing passage, and (B) has a self-sealing slit which opens to permit flow therethrough in response to increased pressure on the side of said valve facing the interior of said pouch;
• and
• a removable and disposable cover formed as extensions of at least two of said pouch web portions which enclose said fitment spout and which have peripheral margins sealed together to define a hermetically sealed volume around said fitment spout.