As they say - photos/video or it never happened … so I went out earlier to “re-enact” this bit of fun.
The landing was intentionally a tad “firm” … last thing I wanted to happen was the string to blow up into the props. 
Notice also the “quick release” that enables the “recipient” to easily detach the bottle. 
(Gotta love portrait video, too. 
)
Judging from the prop sound as the load increased … I reckon two bottles might be possible.