How One Piece Valve Helps Improve User Experience in Compact Designs

https://miniopticsdesk.yousher.com/silicone-valve-seal-buying-guide-for-oem-and-private-label-projects

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