If you would post it I'd really appreciate that. I know it's a blindingly easy prop - if you have the label lol - but It will look good on my shelf and is an alien in its own right according to Sarah Jane's watch.
I'm pretty sure I found the exact type of bottle used! They're Homebrew 330ml PET bottles with white caps.
Compare them to closeups of BubbleShock!, and you can see it's either the same bottle or a very close match.