Multi-compartmented container

1. A container comprising:

a top cap having an open end, a closed end, a longitudinal axis extending between the open end of the top cap and the closed end of the top cap, and at least one inwardly-projecting annular ridge, the open end of the top cap having an edge facing away from the closed end of the top cap and in the direction of the longitudinal axis of the top cap;

a bottom cap having an open end, a closed end, a longitudinal axis extending between the open end of the bottom cap and the closed end of the bottom cap, and at least one inwardly-projecting annular ridge, the open end of the bottom cap having an edge facing away from the closed end of the bottom cap and in the direction of the longitudinal axis of the bottom cap; and

a body having an open end, a closed end, and an outer surface having at least three annular grooves,

wherein the open end of the body is adapted to slide inside the open end of the top cap such that the at least one inwardly-projecting annular ridge of the top cap is adapted to engage with a first one of the at least three annular grooves in a pre-locked position, and a second one of the at least three annular grooves in a locked position,

wherein the closed end of the body is adapted to slide inside the open end of the bottom cap such that the at least one inwardly-projecting annular ridge of the bottom cap is engagable with a third one of the at least three annular grooves,

wherein a retention force against axial disengagement of the at least one inwardly-projecting ridge from the body in the locked position is greater than another retention force against axial disengagement of the at least one inwardly-projecting ridge from the body in the pre-locked position; and

wherein the edges of the top cap and the bottom cap abut each other when the closed end of the body is inserted into the open end of the bottom cap such that the at least one inwardly-projecting annular ridge of the bottom cap is engaged with the third one of the at least three annular grooves and the open end of the body is inserted into the open end of the top cap such that the at least one inwardly-projecting annular ridge of the top cap is engaged with the second one of the at least three annular grooves.

2. The container of claim 1 , wherein:

the open ends of the top cap and the bottom cap do not meet when the closed end of the body is fully inserted into the open end of the bottom cap and the open end of the body is inserted into the open end of the top cap such that the at least one inwardly-projecting annular ridge of the top cap is engaged with the first one of the at least three annular grooves.

3. The container of claim 1 , wherein the body and the top cap engage to form a space having a first volume and the body and the bottom cap engage to form a space having a second volume.

4. The container of claim 3 , wherein the first volume is greater than the second volume.

5. The container of claim 1 , wherein the top cap includes at least one inwardly-projecting column adapted to increase friction between the top cap and the body.

6. The container of claim 5 , wherein the top cap includes six inwardly-projecting columns arranged around an inner surface.

7. The container of claim 1 , wherein a diameter of the bottom cap adjacent the open end is greater than a diameter of the bottom cap adjacent the closed end.

8. The container of claim 1 , wherein at least one of the top cap, the bottom cap, and the body includes hydroxypropylmethylcellulose (HPMC).

9. The container of claim 1 , wherein compositions of the top cap and the bottom cap are different, such that a dissolution rate of the top cap is different than a dissolution rate of the bottom cap.

10. A pharmaceutical dosage form comprising:

a first cap having an open end, a closed end, a longitudinal axis extending between the open end of the first cap and the closed end of the first cap, and a first inwardly-projecting annular ridge, the open end of the first cap having an edge facing away from the closed end of the first cap and in the direction of the longitudinal axis of the first cap;

a second cap having an open end, a closed end, a longitudinal axis extending between the open end of the second cap and the closed end of the second cap, and a second inwardly-projecting annular ridge, the open end of the second cap having an edge facing away from the closed end of the second cap and in the direction of the longitudinal axis of the second cap; and

a body having an open end, a closed end, and an outer surface having a plurality of annular grooves,

wherein the first inwardly-projecting annular ridge and a first one of the plurality of annular grooves engage one another as first complementary snap-fit members configured to engage when the first cap is positioned on the body in a first axial position, and wherein the first inwardly-projecting annular ridge and a second one of the plurality of annular grooves engage one another as second complementary snap-fit members configured to engage when the first cap is positioned on the body in a second axial position different from the first axial position,

wherein the closed end of the body is adapted to slide inside the open end of the second cap such that the second inwardly-projecting annular ridge of the second cap is engagable with a third one of the annular grooves of the body,

wherein the second complementary snap-fit members are adapted to provide a retention force against axial disengagement of the first cap from the body which is higher than a retention force provided by the first complimentary snap-fit members, and

wherein the edges of the first cap and the second cap abut each other when the closed end of the body is inserted into the open end of the second cap such that the second inwardly-projecting annular ridge is engaged with the third one of the annular grooves of the body and the open end of the first cap is positioned on the open end of the body such that the second complementary snap-fit members are engaged.

11. The pharmaceutical dosage form of claim 10 , wherein a diameter of the cap adjacent the open end is greater than a diameter of the cap adjacent the closed end.

12. The pharmaceutical dosage form of claim 10 , wherein at least one of the first cap, the second cap, and the body includes hydroxypropylmethylcellulose (HPMC).

13. The pharmaceutical dosage form of claim 10 , wherein compositions of the first cap or the second cap and the body are different, such that a dissolution rate of the cap is different than a dissolution rate of the body.

14. The container of claim 1 , wherein the first one of the at least three annular grooves has a first depth, and wherein the at least one inwardly-projecting annular ridge of the top cap extends less than the first depth.

15. The container of claim 1 , wherein the second one of the at least three annular grooves has a second depth, and wherein the at least one inwardly-projecting annular ridge of the top cap extends the full second depth.

16. The container of claim 1 , wherein the first one of the at least three annular grooves has a first depth and the second one of the at least three annular grooves has a second depth less than the first depth.

17. The container of claim 1 , wherein the first one of the at least three annular grooves has a first width and a first depth and the second one of the at least three annular grooves has a second width less than the first width and a second depth less than the first depth.

18. The pharmaceutical dosage form of claim 10 , wherein the first one of the plurality of annular grooves has a first depth, and wherein the first inwardly-projecting annular ridge extends less than the first depth.

19. The pharmaceutical dosage form of claim 10 , wherein the second one of the plurality of annular grooves has a second depth, and wherein the first inwardly-projecting annular ridge extends the full second depth.

20. The pharmaceutical dosage form of claim 10 , wherein the first one of the plurality of annular grooves has a first depth and the second one of the plurality of annular grooves has a second depth less than the first depth.

21. The pharmaceutical dosage form of claim 10 , wherein the first one of the plurality of annular grooves has a first width and a first depth and the second one of the plurality of annular grooves has a second width less than the first width and a second depth less than the first depth.

22. The container of claim 1 , wherein a diameter of the open end of the top cap is the same as a diameter of the open end of the bottom cap.

23. The pharmaceutical dosage form of claim 10 , wherein a diameter of the open end of the first cap is the same as a diameter of the open end of the second cap.