A flexible, stackable container for storing a quantity of a product, comprising: a sealed package formed from a single sheet of film and retaining the quantity of the product disposed therein, the package having a plurality of sides including a first side having an outer first surface and an oppositely disposed second side having an outer second surface, and outwardly extending first corner seals (58, 60) formed in the film at the edges of the first side and surrounding the first side of the package and outwardly extending second corner seals (62, 64) formed in the film at edges of the second side and surrounding the second side of the package; characterized by a lid fitment (14, 202, 214, 232, 252) attached to the first surface of the_first side of the package, wherein the lid fitment (14, 202, 214, 232, 252) comprises a base (16, 204, 220, 234, 256) having a central opening and a lid having a complimentary shape to the base to form a seal therebetween when the lid is closed down onto the base (16, 204, 220, 234, 256), and wherein the base is sealed to one of the first surface of the first side and the first corner seals surrounding the first side such that a portion of the first surface is accessible from the exterior of the container when the lid is separated from the base of the lid fitment (14, 202, 214, 232, 252); and a reclosable flap defined by a line of reduced strength in the_first surface of the first side such that the line of reduced strength yields to separate the flap from a remaining portion of the film at the first surface when a force is applied to the flap to define an opening in the first surface of the first side of the package,_and a cover portion (290, 310) overlying the flap, wherein a portion of the cover portion (290, 310, 334) is configured to reseal the package after the flap is separated at the line of reduced strength, wherein: the film sheet has a lower leading edge, an upper trailing edge, and oppositely disposed lateral edges (32, 34), the lateral edges (32, 34) are sealed together to form an edge seal, the lateral side portions of the leading and trailing edges (28, 30) are sealed together to form leading and trailing seals (70, 72) at third and fourth sides of the package, respectively, portions of the first side and portions of the second side are tucked inwardly toward the interior of the package and disposed beneath the leading and trailing seals (70, 72), and the leading and trailing seals (70, 72) are folded over and disposed substantially in the plane of the third and fourth sides of the package, respectively, and wherein the lateral sides of the base (16, 204, 220, 234, 256) of the lid fitment (14, 202, 214, 232, 252) are sealed to the corresponding portions of the corner seals (58, 59, 60, 61, 62, 63, 64). a sealed package formed from a single sheet of film and retaining the quantity of the product disposed therein, the package having a plurality of sides including a first side having an outer first surface and an oppositely disposed second side having an outer second surface, and outwardly extending first corner seals (58, 60) formed in the film at the edges of the first side and surrounding the first side of the package and outwardly extending second corner seals (62, 64) formed in the film at edges of the second side and surrounding the second side of the package; characterized by a lid fitment (14, 202, 214, 232, 252) attached to the first surface of the_first side of the package, wherein the lid fitment (14, 202, 214, 232, 252) comprises a base (16, 204, 220, 234, 256) having a central opening and a lid having a complimentary shape to the base to form a seal therebetween when the lid is closed down onto the base (16, 204, 220, 234, 256), and wherein the base is sealed to one of the first surface of the first side and the first corner seals surrounding the first side such that a portion of the first surface is accessible from the exterior of the container when the lid is separated from the base of the lid fitment (14, 202, 214, 232, 252); and a reclosable flap defined by a line of reduced strength in the_first surface of the first side such that the line of reduced strength yields to separate the flap from a remaining portion of the film at the first surface when a force is applied to the flap to define an opening in the first surface of the first side of the package,_and a cover portion (290, 310) overlying the flap, wherein a portion of the cover portion (290, 310, 334) is configured to reseal the package after the flap is separated at the line of reduced strength, the film sheet has a lower leading edge, an upper trailing edge, and oppositely disposed lateral edges (32, 34), the lateral edges (32, 34) are sealed together to form an edge seal, the lateral side portions of the leading and trailing edges (28, 30) are sealed together to form leading and trailing seals (70, 72) at third and fourth sides of the package, respectively, portions of the first side and portions of the second side are tucked inwardly toward the interior of the package and disposed beneath the leading and trailing seals (70, 72), and the leading and trailing seals (70, 72) are folded over and disposed substantially in the plane of the third and fourth sides of the package, respectively, and wherein the lateral sides of the base (16, 204, 220, 234, 256) of the lid fitment (14, 202, 214, 232, 252) are sealed to the corresponding portions of the corner seals (58, 59, 60, 61, 62, 63, 64).