Coke bottle with wire

BEE0F1E0-3A3A-47D3-8F75-03A8845DFB79

What to do

Blow the small pipe in order to move the thread around.

The coke bottle is on stock again from 1-11-21!!!

Purpose

To lengthen a continuous expiratory flow rate, as well as to improve the coordination of the eyes.

 4.00