The shaking, opening and (faintly) closing of a water bottle. The crystal-microphone is attached to the water bottle the whole time. At first to the side and then later to the top. Tascam.
We filled a glass bottle with water from the kitchen sink, then quickly turned the bottle upside-down. The water made a popping sound as it chugged out, making splashing sounds.
Please excuse the naming convention. It is for a university project that i had to begin with my student number. This is the sound of a plastic spray bottle of water being squirted.