Sound from 'pop-up video'

does everyone remember that VH1 show called ‘pop-up video’. I am trying to track down that sound effect that they used when they were popping up a piece of trivia. Kind of a soft ‘blooop’ sound.

I have checked out some water drop sound effects, but they seem to have to much high end noise in them. And since I don’t know anything about sound shaping, does anyone know where I could download a sound effect like it, either for pay or for free?