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A stackable storage tray that can be combined with an identical stackable storage tray to form an enclosed box. The stackable storage tray comprises a flat base, a rear wall, two side walls, and an open front. Each of the two side walls are complementary with the respective side walls of a second id

A stackable storage tray that can be combined with an identical stackable storage tray to form an enclosed box. The stackable storage tray comprises a flat base, a rear wall, two side walls, and an open front. Each of the two side walls are complementary with the respective side walls of a second identical stackable storage tray, so that when one storage tray is flipped upside down the two trays form an enclosed box—the open front of the stationary tray receives the complementary rear wall of the flipped tray, the rear wall of the stationary tray fits in the complementary open front of the flipped tray, and the sides have side walls and open spaces that are complementary reverse mirror images of each other and fit together to form an enclosed box.

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1. A stackable storage tray, comprising: a base comprising a rear edge, a first side edge, a second side edge and a front edge;a rear wall having a bottom edge connected to the rear edge of the base;a first side wall and a second side wall, wherein the first side wall is connected to the first side

1. A stackable storage tray, comprising: a base comprising a rear edge, a first side edge, a second side edge and a front edge;a rear wall having a bottom edge connected to the rear edge of the base;a first side wall and a second side wall, wherein the first side wall is connected to the first side edge of the base and is spaced apart from the rear wall by a distance substantially equal to the width of the first side wall to form a first side space, and the second side wall is connected to the second side edge of the base and is spaced apart from the rear wall by a distance substantially equal to the width of the second side wall to form a second side space, and wherein the front edge has no side wall, thereby forming an open front space;wherein the heights of the rear wall, the first side wall and the second side wall are substantially equal;wherein the stackable storage tray is configured to be inverted and interleaved with a second identical stackable storage tray, such that the rear wall of the storage tray interleaves with the open front space of the second storage tray, the first side wall of the storage tray interleaves with the first side space of the second storage tray, and the second side wall of the storage tray interleaves with the second side space of the second storage tray, thereby forming an enclosed box. 2. The stackable storage tray of claim 1, wherein at least two or more of the back side wall, first side wall and second side wall further comprise an engagement element on a top portion, and wherein the stackable storage tray is configured to be stackable on top of the second identical stackable storage tray and the complementary engagement elements engage with corresponding complementary engagement elements on a bottom portion of the base, thereby preventing relative horizontal movement of the first stackable storage tray and second identical stackable storage tray. 3. The stackable storage tray of claim 1, wherein the first side space and second space are substantially equal in width. 4. The stackable storage tray of claim 1, wherein the first side wall comprises a first portion that is substantially equal in height to the rear wall and a second portion that is lower in height than the rear wall, and wherein the second side wall comprises a first portion that is substantially equal in height to the rear wall and a second portion that is lower in height than the rear wall. 5. A stackable storage tray and box system, comprising a first stackable storage tray according to claim 1 and a second stackable storage tray according to claim 1. 6. The stackable storage tray of claim 1, further comprising a third side wall and third space on the first side edge of the base, wherein the third side wall is positioned between the first side wall and the rear wall, and the third side wall has a width that is substantially equal to and is positioned to insert within the third space when the storage tray is inverted and interleaved with a second identical storage tray; anda fourth side wall and fourth space on the second side edge of the base, wherein the fourth side wall is positioned between the second side wall and the rear wall, and the fourth side wall has a width that is substantially equal to and is positioned to insert within the fourth space when the storage tray is inverted and interleaved with a second identical storage tray. 7. The stackable storage tray of claim 6, wherein the height of the third side wall is less than the height of the first side wall and the third space comprises a partial side wall having a height substantially equal to the difference in height between the first side wall and the third side wall, and wherein the height of the fourth side wall is less than the height of the second side wall and the fourth space comprises a partial side wall having a height substantially equal to the difference in height between the second side wall and the fourth side wall. 8. The stackable storage tray of claim 1, further comprising complementary engagement elements on the top of the base in the first side space and second side space that are complementary to the engagement elements on the top of the first side wall and second side wall. 9. The stackable storage tray of claim 8, wherein the engagement elements comprise a curved concave and complementary curved convex shaped surface. 10. The stackable storage tray of claim 8, wherein the engagement elements comprise a plurality of studs and complementary holes. 11. The stackable storage tray of claim 1, further comprising a plurality of first and second side walls spaced apart and configured to interleave with one another. 12. The stackable storage tray of claim 11, wherein the first side space and second side space are substantially equal in width. 13. The stackable storage tray of claim 11, wherein all of the plurality of side walls are substantially equal in height. 14. The stackable storage tray of claim 11, wherein at least two or more of the back side wall, first side wall and second side wall further comprise an engagement element on a top portion, and wherein the stackable storage tray is configured to be stackable on top of the second identical stackable storage tray and the complementary engagement elements engage with corresponding complementary engagement elements on a bottom portion of the base, thereby preventing relative horizontal movement of the first stackable storage tray and second identical stackable storage tray. 15. The stackable storage tray of claim 14, further comprising complementary engagement elements on the top of the base in the first side space and second side space that are complementary to the engagement elements on the top of the first side wall and second side wall. 16. The stackable storage tray of claim 14, wherein the engagement elements comprise a curved concave and complementary curved convex shaped surface. 17. The stackable storage tray of claim 14, wherein the engagement elements comprise a plurality of studs and complementary holes. 18. A stackable storage tray, comprising: a base comprising a rear edge, a first side edge, a second side edge and a front edge;a rear wall having a bottom edge connected to the rear edge of the base, a first side edge and a second side edge;a first rear side wall and second rear side wall, wherein the first rear side wall has a bottom edge connected to the first side edge of the base and a rear edge connected to a first side edge of the rear wall, and the second rear side wall has a bottom edge connected to the second side edge of the base and a rear edge connected to the second side edge of the rear wall;a first side wall and a second side wall, wherein the first side wall is connected to the first side edge of the base and is spaced apart from the first rear side wall by a distance substantially equal to the width of the first side wall to form a first side space and is spaced apart from the front edge by a distance substantially equal to the width of the first rear side wall to form a first side front space, and the second side wall is connected to the second side edge of the base and is spaced apart from the second rear side wall by a distance substantially equal to the width of the second side wall to form a second side space and is spaced apart from the front edge by a distance substantially equal to the width of the second rear side wall to form a second side front space, and wherein the front edge has no side wall, thereby forming an open front space;wherein the height of the rear wall, the first side wall and the second side wall is substantially equal;wherein the stackable storage tray is configured to be inverted and interleaved with a second identical stackable storage tray, such that the rear wall and connected first rear side wall and second rear side wall of the storage tray interleaves with the open front space of the second storage tray and the first and second side front space, the first side wall of the storage tray interleaves with the first side space of the second storage tray, and the second side wall of the storage tray interleaves with the second side space of the second storage tray, thereby forming an enclosed box. 19. The stackable storage tray of claim 18, wherein the first side space and second space are substantially equal in width. 20. A stackable storage tray and box system, comprising a first stackable storage tray according to claim 18 and a second stackable storage tray according to claim 10, wherein the first stackable storage tray is stacked or interleaved with the second stackable storage tray. 21. The stackable storage tray of claim 18, wherein at least two or more of the back side wall, first rear side wall, second rear side wall, first side wall and second side wall further comprise an engagement element on a top portion, and wherein the stackable storage tray is configured to be stackable on top of the second identical stackable storage tray and the complementary engagement elements engage with corresponding complementary engagement elements on a bottom portion of the base, thereby preventing relative horizontal movement of the first stackable storage tray and second identical stackable storage tray. 22. The stackable storage tray of claim 21, further comprising complementary engagement elements on the top of the base in the first side space and second side space that are complementary to the engagement elements on the top of the first side wall and second side wall. 23. The stackable storage tray of claim 21, wherein the engagement elements comprise a curved concave and complementary curved convex shaped surface. 24. The stackable storage tray of claim 21, wherein the engagement elements comprise a plurality of studs and complementary holes.