Gluggle Fish Jug

This jug emits glug sounds when leaned back and forth, such as while pouring its contents. The sound is produced by the exchange of water and air that occurs between the two chambers in the two sections of the fish-shaped jug body. 

No supports needed. 

Here's a video of my model:

A similar vase appeared in the video of Steve Mould and it shows how this vase works.