referring now to the drawings in detail wherein like numerals indicate like elements throughout the several views , one sees that fig1 and 2 disclose blanks 10 , 12 , respectively , with similar configurations of the rigid or semi - rigid portions . the blanks 10 , 12 both include rigid or semi - rigid portions which are typically made from a single piece of paper , cardboard , fiberboard , chipboard , plastic or similar material . blanks 10 , 12 include front panel 14 and rear panel 16 ( the “ front ” and “ rear ” characteristics are arbitrary and used with respect to the illustrated embodiments ) which are separated by first gusset ( or panel ) 18 which includes first front gusset wall 20 and first rear gusset wall 22 separated by first gusset fold 24 . likewise , front panel 14 is joined to first front gusset wall 20 by first front fold 26 and rear panel 16 is joined to first rear gusset wall 22 by first rear fold 28 . likewise , second gusset ( or panel ) 30 includes second rear gusset wall 32 and second front gusset wall 34 , separated by second gusset fold 36 with second front gusset wall 34 joined to front panel 14 by second front fold 38 . tab 42 is joined to rear panel 16 by second rear fold 44 , and includes a notch 43 to prevent interference with closure 70 . as shown in fig3 and 4 , tab 42 is used to overlap and join to the distal edge 46 of second rear gusset wall 32 thereby forming the resulting container , with a resulting storage volume . in some embodiments , tab 42 may extend from or be incorporated into second gusset ( or panel ) 30 . in some embodiments , the first and second panels 18 do not include the gusset structure and therefore do not include first and second gusset folds 24 , 36 . lower horizontal fold 50 extends across the blanks 10 , 12 , perpendicular to folds 24 , 26 , 28 , 36 , 38 and 44 , thereby defining second rear gusset wall floor panel 52 , second front gusset wall floor panel 54 , front panel floor panel 56 , first front gusset wall floor panel 58 , first rear gusset wall floor panel 60 and rear panel floor panel 62 . first front gusset wall floor panel 58 and first rear gusset wall floor panel 60 are joined by an extension of first gusset fold 24 . similarly , second front gusset wall floor panel 54 is joined to second rear gusset wall floor panel 56 by an extension of second gusset fold 36 . typically , the front panel floor panel 56 and the rear panel floor panel 62 have inclined lateral walls , 57 , 63 , respectively . similarly , the combination of first front and rear floor panels 58 , 60 and of second front and rear floor panels 52 , 54 have inclined lateral walls 64 , 66 , respectively . other designs of the various floor panels may be used for different applications . typically , after the tab 42 has been overlapped and joined to the distal edge of second rear gusset wall 32 , thereby forming the storage volume of the container , floor tabs 52 , 54 , 56 , 58 , 60 and 62 are folded inwardly and glued with adhesive or otherwise secured to form the floor of the resulting package . the blank 10 shown in fig1 includes a closure 70 , such as , but not limited to , a self - mating zipper profile in a continuous one - piece configuration , attached to what will be the interior of the resulting package , and is typically supplied as a single strip of zipper profile . therefore , when the package is formed , the closure or self - mating zipper profile 70 will engage against itself around the upper interior perimeter of the package . a self - mating zipper profile is one that , when folded back upon itself , or when two identical segments are put in opposition , can be pressed together and engage in a way that typical dissimilar zipper halves are mated together . the locking members can take a variety of shapes , typically including multiple tracks , but can include such configurations as a series of posts with hooks ( males ), a series of u - shaped members with hooks ( females ), a field of mushrooms ( aplix ), or hook and loop ( velcro ). closure or self - mating zipper profile 70 may extend beyond the edges of the blank 10 in order to provide material that can overlap at the opposite end of closure or zipper profile 70 in order to create a lap seal . as shown in fig3 and 4 , the opposite ends 71 , 73 of closure or zipper profile 70 may be interlocked and / or sealed together during formation of the package . similarly , the blank 12 shown in fig2 includes a strip of flexible , typically polymeric , film 72 attached to the top edge of the blank 10 . film 72 may be attached on either side of blank 12 , so that film 72 may be attached to the interior or exterior of the resulting package . film 72 includes an integral or attached closure 70 , such as , but not limited to , a self - mating zipper profile in a continuous one - piece configuration , above the rigid portion of the blank 12 , which will be on the interior of the strip of film 72 when the package is formed , so that the self - mating zipper profile , typically provided as a single piece , will be around the interior perimeter of package and will be able to engage with itself . film 72 may extend beyond the edges of the blank 12 in order to provide material that can overlap at the opposite end of film 72 in order to create a lap seal . once the closure ( or zipper ) 70 , or film portion 72 , is attached to the blank 10 or 12 , the container can be folded to construct a box shape . the top can be sealed closed , or the bottom folded and sealed closed . additionally , the top edge of blank 10 or 12 can be sealed closed if provision has been made fro web flanges about the closure or zipper 70 . depending on the package style , the package can be filled through the bottom , through the opened closure or zipper 70 , or by leaving a portion of the closure or zipper 70 unattached and filling between the closure or zipper 70 and one of the blank walls , and subsequently sealing the unattached portion of the closure or zipper 70 to the blank wall . additionally , fig5 illustrates how a continuous zipper strip 70 ( or closure strip ) can be attached to a series of blanks 10 that are connected side - by - side . this design greatly simplifies the manufacturing process and allows the zipper to be attached while the blank is in its flat unfolded state . this construction also allows for the possibility of forming a gusset in the flexible portion of the package to match the side walls of the rigid portion . thus the several aforementioned objects and advantages are most effectively attained . although preferred embodiments of the invention have been disclosed and described in detail herein , it should be understood that this invention is in no sense limited thereby and its scope is to be determined by that of the appended claims .