My only question (wherein, I feel, lies the glitch):

 Why would you use a 'paper' glass in the first place? Why not use a normal glass (made of steel or other objects) whose density is HIGHER than water? Or use another dense fluid inside the "floating" glass whose density is higher than water? If it is repeatable (not that I believe in his claim with paper glass), then there would be some credibility to give a second thought on his claim.

Secondly, even if it is possible with 100 gm of water, could you replicate this with say 5 liters of water? Will your  paper glass be able to hold it?

Using objects of  same or lower density than water is not gonna cut it...

Bottom line: Another hoax in the making. More than the charlatans, I am disgusted by these worthless, incompetent,  and thoughtless journalists who would write ANYTHING for money. Really disgusting.