Why Prototype Testing Is Important for Custom No Drip Valve

https://dripfreeflowblog.tearosediner.net/how-to-compare-no-drip-valve-options-for-a-new-packaging-project

Designing a small part can affect the whole product. A no drip 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