Why Prototype Testing Is Important for Custom One Piece Valve

https://telegra.ph/Why-a-One-Piece-Valve-Is-Useful-for-Compact-Dispensing-Systems-06-05

Designing a small part can affect the whole product. A one piece valve may look simple, but it has a real job to do. It must work with the cap, case, fluid, air path, or light path around it