How to do the floaty mouth thing seen in the kickstarter

#1

this is what i’m refering to: https://youtu.be/qnL40CbuodU?t=51
OsciStudio Version: 0.6.0.38
Operating System: windows

#2

armatures, shapekeys, lattices

https://docs.blender.org/manual/en/latest/animation/index.html#animation-rigging