How to develop an iPint style fluid effect? [on hold]

For those who don't know what iPint is, it is an "ancient" iPhone app that simulates a pint of beer and have a realistic fluid physics that really looked like a beer. It is still on the App Store on this URL: http://ift.tt/1uQhEsI

Well what I'm aiming to do is something similar but instead of bear I need water. Anyone knows a tutorial or a sample code?