Devices and methods relating to modular storage

1. An apparatus comprising:

a holder comprising a flexible sheet with a foldable portion that is foldable along an axis to form an upper portion and a lower portion of said flexible sheet, wherein said upper portion contains at least one magnet embedded therein and said lower portion contains at least one magnet embedded therein; and

at least one rigid container dimensioned to fit within said holder when said holder is folded, said rigid container having at least a first magnet, said at least a first magnet located to engage said at least one magnet embedded in said lower portion of said holder and said at least one magnet embedded in said upper portion of said holder,

wherein the at least a first magnet of the at least one rigid container, the at least one magnet embedded in the lower portion of the holder, and the at least one magnet embedded in the upper portion of the holder, are positioned and configured such that the at least one rigid container is magnetically held by both the upper portion and the lower portion of the holder, and such that only one of the upper portion or the lower portion detaches first from the at least one rigid container when the upper portion and the lower portion of the holder are pulled apart, due to greater or lesser magnetic attraction.

2. An apparatus comprising:

a holder having an upper portion, a lower portion, and a bendable portion between the upper portion and the lower portion, wherein the upper portion includes at least two upper portion magnets and the lower portion includes at least two lower portion magnets; and

a container sized to fit into the holder, wherein the container includes at least two container magnets and is secured to the holder only by magnetic forces,

wherein the at least two container magnets, the at least two upper portion magnets, and the at least two lower portion magnets are positioned and configured such that the container is magnetically held by both the upper portion and the lower portion of the holder, and such that only one of the upper portion or the lower portion detaches first from the container when the upper portion and the lower portion of the holder are pulled apart, due to greater or lesser magnetic attraction.

3. The apparatus of claim 2 , wherein the upper portion of the holder detaches first from the container, wherein the at least two upper portion magnets have a lesser total magnetic attraction to the at least two container magnets than a total magnetic attraction of the at least two lower portion magnets to the at least two container magnets.

4. The apparatus of claim 3 , wherein the lesser total magnetic attraction is based on at least one of: the at least two upper portion magnets having less total magnetic strength than the at least two lower portion magnets, or the at least two upper portion magnets being a greater total distance away from the at least two container magnets than the at least two lower portion magnets.

5. The apparatus of claim 2 , wherein the lower portion of the holder detaches first from the container, wherein the at least two lower portion magnets have a lesser total magnetic attraction to the at least two container magnets than a total magnetic attraction of the at least two upper portion magnets to the at least two container magnets.

6. The apparatus of claim 5 , wherein the lesser total magnetic attraction is based on at least one of: the at least two lower portion magnets having less total magnetic strength than the at least two upper portion magnets, or the at least two lower portion magnets being a greater total distance away from the at least two container magnets than the at least two upper portion magnets.

7. An apparatus comprising:

a holder having an upper portion, a lower portion, and a bendable portion between the upper portion and the lower portion, wherein the upper portion includes at least two upper portion magnets and the lower portion includes at least two lower portion magnets;

an upper container sized to fit into the holder, wherein the upper container includes at least two upper container magnets and is secured to the upper portion of the holder only by magnetic forces; and

a lower container sized to fit into the holder, wherein the lower container includes at least two lower container magnets and is secured to the lower portion of the holder only by magnetic forces,

wherein the at least two upper container magnets, the at least two lower container magnets, the at least two upper portion magnets, and the at least two lower portion magnets are positioned and configured such that the upper container and the lower container are magnetically attracted to each other, and such that the upper container and the lower container only detach first from each other when the upper portion and the lower portion of the holder are pulled apart due to greater or lesser magnetic attraction.

8. The apparatus of claim 7 , wherein the upper container and the lower container have a lesser magnetic attraction to each other than both a magnetic attraction of the upper container to the upper portion of the holder and a magnetic attraction of the lower container to the lower portion of the holder.

9. The apparatus of claim 7 , wherein the at least two upper portion magnets include two upper portion magnets having opposite polarities and the at least two lower portion magnets include two lower portion magnets having opposite polarities.

10. The apparatus of claim 9 , wherein the two upper portion magnets and the two lower portion magnets are configured such that any two adjacent magnets have opposite polarities.