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A standup bags made of a flexible material and methods of producing these standup bags. In particular, the standup bags have at least one substantially flat surface which is free of seams and folds. When the bag is filled with a flowable substance, the pressure exerted by the fluid upon the flat sur

A standup bags made of a flexible material and methods of producing these standup bags. In particular, the standup bags have at least one substantially flat surface which is free of seams and folds. When the bag is filled with a flowable substance, the pressure exerted by the fluid upon the flat surfaces allows the bag to be self-standing. Additionally, the standup includes at least one contour structure that defines the geometry of the bag and also contributes to the standup bag's ability to be self-standing when even partially filled with a flowable substance.

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1. A method of making a six sided standup bag comprising the steps of: (a) positioning a first sheet of material on a second sheet of material, each of the first and second sheets of material having a first side edge and a second side edge opposing the first side edge, a top edge and a bottom edg

1. A method of making a six sided standup bag comprising the steps of: (a) positioning a first sheet of material on a second sheet of material, each of the first and second sheets of material having a first side edge and a second side edge opposing the first side edge, a top edge and a bottom edge; (b) securing the first sheet of material to the second sheet of material by forming a first seal proximate the first side edge and a second seal proximate the second side edge, each of the first and second seals including a central region and end segments extending toward the respective top and bottom edges; (c) creating a first fold on the first sheet of material, the first fold substantially corresponding to the first side edge and spaced apart therefrom; (d) creating a second fold on the second sheet of material, the second fold substantially corresponding to the second side edge and spaced apart therefrom; (e) rotating the first side edge away from the first fold and rotating the second side edge away from the second fold, to, in turn, substantially expose the first fold at a first end and a second fold at a second end; (f) forming a third seal extending from the first fold to the second fold, the third seal having a portion thereof corresponding to the top edge of the first and second sheets of material, and end segments sealing portions of the first sheet on either side of the first fold; and (g) forming a fourth seal extending from the first fold to the second fold, the fourth seal having a portion thereof corresponding to the bottom edge of the first and second sheets of material and end segments sealing portions of the second sheet on either side of the second fold, to, in turn, substantially form a standup bag, that, upon filling renders a substantially six sided bag. 2. The method of claim 1 wherein the first seal, second seal, third seal, and fourth seal are substantially U-shaped seals. 3. The method of claim 1 further comprising the step of attaching a fitment to one of the first and second sheets of material prior securing the first edge to the second edge. 4. The method of claim 1 further comprising the step of placing a fitment between the edges of the first seal, the second seal, or the third seal. 5. The method of claim 1 further comprising the step of forming at least one integrated handle on the standup bag. 6. The method of claim 1 further comprising the step of attaching at least one handle to the standup bag. 7. The method of claim 1 wherein the third seal comprises: a central region extending from the end segment of the first seal to the end segment of the second seal substantially proximate the top edge; opposing end segments extending from the central region on opposing sides thereof, the opposing end segments extending to the first fold and the second fold, respectively. 8. The method of claim 1 wherein the fourth seal comprises: a central region extending from the end segment of the first seal to the end segment of the second seal substantially proximate the bottom edge; opposing end segments extending from the central region on opposing sides thereof, the opposing end segments extending to the first fold and the second fold, respectively. 9. The method of claim 1 wherein the shape of the first seal, second seal, third seal and fourth seal is substantially uniform. 10. The method of claim 1 wherein the end segments of each of the first seal, the second seal, the third seal and the fourth seal are substantially identical and oblique relative to the respective central region from which they emanate at substantially similar angles relative thereto.