Fluid-tight dilution bottle and cap

1. A fluid-tight vial comprising:

(a) a substantially cylindrical container with an open end having a circumferential lip, a circumferential flange integral with said circumferential lip, a screw thread and a ratchet-toothed ring proximal to said open end; and

(b) a cap adapted to engage said container's open end in fluid-tight fashion, said cap comprising a circumferential skirt, a hinge, a frangible strip and a flip-top, wherein the inner portion of said skirt has a screw thread capable of matingly engaging said screw thread of said open end of said container and a ratchet-toothed ring capable of lockingly engaging said ratchet-toothed ring of said open end of said container when said cap is threaded onto said container

wherein said flip-top has an inner circumferential recess capable of non-threadedly engaging said circumferential flange to form a fluid-tight seal between said flange and said recess.

2. The vial of claim 1 wherein said screw thread of said container is located below said circumferential lip and said ratchet-toothed ring of said container is located beneath said screw thread of said container.

3. The vial of claim 2 wherein said ratchet-toothed ring of said cap is located beneath said screw thread of said cap.

4. The vial of claim 1 wherein said frangible strip is located between said skirt and said flip-top.

5. The vial of claim 4 wherein said frangible strip has a pull tab for peeling it away from said cap.

6. The vial of claim 5 wherein said flip-top is attached to said skirt by said hinge and is openable after said frangible strip is removed.

7. The vial of claim 1 wherein said inner circumferential recess of said flip-top has a radial tongue portion proximal to said hinge capable of guiding said inner circumferential recess into alignment with said circumferential flange-of said container.