So, start poppin' those pills until you have six bottles, preferably the jumbo ones . . . .
Step 1: Wiring
Wire the leads together in a parallel circuit, i.e. two wires as the "sides" and the resistors as the "rungs" in a ladder-like formation. This distributes equal voltage to all the LEDs, as well as continuing to function even when one of the LEDs is burned out. I used speaker wire with a translucent coating that lets the copper color show, which plays well with the orange bottles.
Last, I wired it to a 6V transformer, formerly of an Aiwa discman. This steps down the house's current enough to keep the bulbs from burning out.
Step 2: Substrate
Step 3: Assembly
Put rubber gaskets around the bottle spouts so they will be sandwiched tightly when the caps are screwed on. Twist the bottle through the holes, and screw the caps on from the other side, taking care not to twist off the wires -- screw by turning the bottle, not the cap.
Wire and mount the switch. Bolt on backer piece. Dig it.