how do i make a model wobbly like jello

i have searched the internet for the answer but i cannot find it.
in my case i need to make a cube wobbly like jello.
here is a link to what i mean by jello wobbly: Unity - Jelly Cube Test [Softbody] - YouTube
ANY kind of help will be great as i have no clue what to do now.
also if you know anything about how to make something (like a cube) half transparent with color (like jello) please help. ALL help will be appreciated!
thank you for reading this.

this should help