PCT Ltd (PCTL)

[Evaluate]

The tweet appears to be (very) good news.
* Can anyone explain: what does it mean (in regards to 1 of the bottles) "injected dye to establish well communication"?
* How does dye establish communications?
* Why is this “shockingly GREAT!”?
* What will the next step of testing hopefully show?
* What is in the other bottle?
(In the twitter picture there are an upper & lower bottle, but the description states "bottle on the left" ... perhaps the picture was posted sideways?)