This demonstration consists of two sounds produced in parallel: a soft wind and a feedback.
Soft Wind
Breathe in and out very softly with your mouth. Now catch this airflow with the microphone. Experiment with how your soft breathing can turn into a whistling and vica versa.
You can do this sound also with a partner. The two breathers should face each other passing the mic between them.
Feedback
Carefully move the microphone into the carafe. When you point the mic towards the water, feedback is produced. You can control its volume and pitch by moving the mic up and down. Try to keep the sound as steady as possible. Be careful not to push the microphone into the water.