Why Prototype Testing Is Important for Custom Silicone Valve Seal

https://rubbervalvetech.yousher.com/what-makes-a-liquid-dispensing-valve-reliable-during-daily-use

Designing a small part can affect the whole product. A silicone valve seal 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