Actually the mystery's been mostly solved.

I don't know if there was an Australian woman who "stayed up" until noon to watch this, but the item claimed by some to be the Coke bottle is merely a lens interreflection.

Those of you who have access to the Apollo 11 EVA video (which should be everybody, right?) can see for yourself. Fast-forward to Aldrin's mobility test. He walks out of the LM's shadow toward the television camera. He passes partly out of frame to the right. Then as he comes back in frame and crosses to the left of the frame, look on the ground near the LM strut. You'll see a bright object that appears to bounce along the ground.

Now if you correlate that to the hot spot on Aldrin's visor, you'll see that it's just part of the same lens "ghosting" that appears all over the Apollo 11 EVA video, where the primary image is "ghosted" -- but inverted in both directions. The "Coke bottle" bounces in exactly the opposite fashion as Aldrin's visor.