How Silicone Valve Seal Helps Improve User Experience in Compact Designs

https://compactopticsreview.timeforchangecounselling.com/common-silicone-valve-seal-mistakes-product-teams-should-avoid

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