How Mini Optics Helps Improve User Experience in Compact Designs

https://flowsealcomponents.theburnward.com/elastomeric-valves-guide-for-flexible-sealing-and-flow-control

Designing a small part can affect the whole product. A mini optics 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