Ear ring of spring
This is a product with a feature that does still not exist in the world right now.
So to keep this a profitable chance for an intelligent entrepreneur, I will keep the secret until the production of 1st promotion video.
No matter which forms of cooperation except acquiring this idea with a 1-time downpayment will I disclose the secret feature.
However, you can still purchase a 3d printed Earring from the following site.