Box insert with vertical rails

1. A registration system comprising:

an insert comprising a center segment and a rail, the rail extending upwards from the center segment, the rail joined to the center segment by a fold line, the rail positioned perpendicular to the center segment; and

a register defining a cutout, the rail sized to fit within the cutout of the register, the cutout receiving the rail, the register configured to slidably move along the rail while maintaining a position parallel to the center segment.

2. The registration system of claim 1 , wherein:

the rail is a first rail;

the insert further comprises a second rail;

the cutout is a first cutout;

the register defines a second cutout; and

the second cutout receives the second rail.

3. The registration system of claim 2 , wherein:

the fold line is a first fold line;

the second rail is joined to the center segment by a second fold line; and

the first fold line is perpendicular to the second fold line.

4. The registration system of claim 3 , wherein:

the insert further comprises a third rail joined to the center segment by a third fold line;

the center segment is positioned between the first rail and the third rail;

the third fold line is parallel to the first fold line; and

the third fold line is perpendicular to the second fold line.

5. The registration system of claim 2 , wherein the center segment is positioned between the first rail and the second rail.

6. The registration system of claim 5 , wherein:

the insert further comprises a third rail; and

a height of the third rail is less than a height of the first rail.

7. The registration system of claim 1 , wherein the register comprises a face segment joined to a side segment by a side fold line.

8. The registration system of claim 7 , wherein the cutout is defined between the face segment and the side segment.

9. The registration system of claim 1 , wherein the cutout is defined by an edge of the register.

10. The registration system of claim 1 , wherein the insert and the register each comprise corrugated cardboard.

11. A register comprising:

a face segment;

a cutout configured to receive a rail of an insert; and

a side segment joined to the face segment by a side fold line, the cutout positioned between the face segment and the side segment.

12. The register of claim 11 , wherein the cutout is defined by an edge of the face segment.

13. The register of claim 11 , further comprising a hole defined by the face segment.

14. The register of claim 11 , wherein:

the cutout is a first cutout;

the first cutout is defined by a first edge of the face segment;

the register further comprises a second cutout; and

the second cutout is defined by a second edge of the face segment.

15. The register of claim 14 , wherein the first edge is perpendicular to the second edge.

16. The register of claim 15 , further comprising a third cutout, the third cutout defined by the first edge of the face segment.

17. The register of claim 14 , wherein the first edge is parallel to the second edge.

18. The register of claim 17 , further comprising a third cutout, the third cutout defined by a third edge of the face segment, the third edge defined perpendicular to the first edge and the second edge.

19. A registration system comprising:

an insert comprising a center segment, a first rail, and a second rail, the first rail extending upwards from the center segment, the first rail joined to the center segment by a first fold line, the second rail joined to the center segment by a second fold line, the first fold line being perpendicular to the second fold line; and

a register defining a first cutout and a second cutout, the first rail sized to fit within the first cutout of the register, the first cutout receiving the first rail, the register configured to slidably move along the first rail while maintaining a position parallel to the center segment, the second cutout receiving the second rail.

20. The registration system of claim 19 , wherein:

the insert further comprises a third rail joined to the center segment by a third fold line;

the center segment is positioned between the first rail and the third rail;

the third fold line is parallel to the first fold line; and

the third fold line is perpendicular to the second fold line.

21. A registration system comprising:

an insert comprising a center segment, a first rail, a second rail, and a third rail, the first rail extending upwards from the center segment, the center segment positioned between the first rail and the second rail, a height of the third rail being less than a height of the first rail; and

a register defining a first cutout and a second cutout, the first rail sized to fit within the first cutout of the register, the first cutout receiving the first rail, the register configured to slidably move along the first rail while maintaining a position parallel to the center segment, the second cutout receiving the second rail.

22. A registration system comprising:

an insert comprising a center segment and a rail, the rail extending upwards from the center segment; and

a register defining a cutout, the rail sized to fit within the cutout of the register, the cutout receiving the rail, the register configured to slidably move along the rail while maintaining a position parallel to the center segment, the register comprising a face segment joined to a side segment by a side fold line.

23. The registration system of claim 22 , wherein the cutout is defined between the face segment and the side segment.

24. A registration system comprising:

an insert comprising a center segment and a rail, the rail extending upwards from the center segment; and

a register defining a cutout, the rail sized to fit within the cutout of the register, the cutout receiving the rail, the register configured to slidably move along the rail while maintaining a position parallel to the center segment; and

wherein the insert and the register each comprise corrugated cardboard.