I see this is an old post, so you’ve probably answered your own questions by now.
Just in case you haven’t, check out this video, which gives some good hints on one way to do a “freeze time” effect:
I’d say a lot of that video is done in post. Not sure about the spinning camera, but if it’s practical, they would have had to have used a specialist rig of some kind.
For the transitions in that glass of water effect, it looked like a combination of curves adjustments, blurs / distortions and something like the “fractal noise” effect in After Effects.
You’d have to play around to get it just right, but if you have After Effects, it should be achievable.
Hope that helps.