Looking at the comments for the video, apart from the usual references to other peoples supposed homosexuality or their mothers, there appears to be a fair amount of doubt as to the authenticity of it's claims.
Several commenters maintain that they tried it and it didn't work with further commenters critisising them for their credulity for even attempting such a feat and putting forth the hypothesis that clear marbles were secretly submerged within the liquid and this was the secret behind the cunning ruse.
I don't think they used those exact words though.
Is this video bogus or the real deal?