The hypotooter is a mini-member of the tootophone family of reed instruments. (See: https://www.instructables.com/id/pvc-TOOTOPHONE-a-musical-reed-instrument and also; https://www.instructables.com/id/Baby-Bass-Tootophone-a-reed-instrument )
It is made from the protective case for a 12 cc hypodermic syringe, which can be purchased from a pet store or veterinary supply store. I use the syringes as tools for extruding silicone rubber in making silicone rubber sculptures. This is a good way to recycle the protective cases.
The needle cover (pink) is sanded down to make the mouthpiece. The reed is cut from a piece of scrap plastic that I recovered from a junked flat screen monitor. Electrical tape holds it all together.
To protect it in my pocket, I made a carrying case out of PVC pipe.
To hear how the hypotooter sounds, listen to the .mp3 audio file in the last step.
Step 1: The Syringe
It's the case we are interested in. The syringe is not needed for this project. Syringes make good tools for precise application of lubricating oil. Without the needles, they can also be used for fine extrusion of silicone rubber. (The needles are too narrow to force the silicone through.) If you discard the needle tips, just be careful. They are very sharp.