Portable beverage holder

1. A portable beverage holder comprising:

a middle piece operably coupled to a lower bottom piece together defining a housing, wherein the middle piece comprises a first frontal opening configured for receiving the stem of a stemmed beverage container, and wherein the bottom piece comprises a second frontal opening, positioned below from and having a larger width than the first frontal opening and configured for receiving the foot of a stemmed container, and wherein the bottom side of the middle piece comprises one or more downwardly projecting flaps configured to secure the foot of the stemmed container against the bottom piece when the foot of the stemmed beverage container is received inside the housing and further comprising a top piece having means for releasably attaching to the topside of the middle piece and comprising a third frontal opening, vertically aligned with the first frontal opening of the middle piece and configured for receiving the stem of a stemmed container.

2. The portable beverage holder of claim 1 , wherein the means for releasably attaching to the topside of the middle piece comprise complementary tabs and slots.

3. The portable beverage holder of claim 1 , wherein the one or more flaps are springs that can be flexed upward after the foot of a stemmed container engages said flaps when entering through the second frontal opening.

4. The portable beverage holder of claim 3 , wherein the one or more flaps comprise distal tips that angle upwards.

5. The portable beverage holder of claim 1 , wherein the bottom piece of the base comprises ridges and grooves to prevent slippage of the base of the stemmed container.

6. The portable beverage holder of claim 1 , wherein the underside of the bottom piece is substantially level.

7. The portable beverage holder of claim 6 , further comprising a support structure having a topside configured to operably couple with the underside of the bottom piece.

8. The portable beverage holder of claim 7 , wherein the support structure is a stake.

9. The portable beverage holder of claim 7 , wherein the support structure is a hinged clamp having means for releasably clamping onto a rail.

10. The portable beverage holder of claim 1 , further comprising a strap having releasable attachment means to secure itself to a support structure, wherein the holder comprises one or more slots for the strap to thread through.

11. The portable beverage holder of claim 1 , further comprising an upwardly projecting wall around the perimeter of the middle piece or substantially so, wherein the wall includes a vertical frontal opening vertically aligned with the first frontal opening and configured for receiving a stem of a stemmed container.

12. The portable beverage holder of claim 11 , wherein the vertical frontal opening comprises a lower section positioned at the top of middle piece and an upper section positioned at the top of the wall, wherein the width of the lower section is narrower than the upper section.

13. The portable beverage holder of claim 12 , wherein the upper section of the vertical frontal opening gradually tapers downward to the lower section of the vertical frontal opening.

14. The portable beverage holder of claim 12 , wherein neither the lower section nor upper section of the vertical frontal opening is wider than 4 inches.

15. The portable beverage holder of claim 12 , wherein the lower section of the vertical frontal opening is 0.5-1.25 inches wide.

16. The portable beverage holder of claim 12 , wherein the wall extends upwards less than 6 inches from the topside of the middle piece.

17. The portable beverage holder of claim 1 , wherein the top piece comprises an outer rim that extends upwards.