Choosing One Piece Valve for Better Fit, Flow, and Long Term Reliability
https://reliableflowparts.capitaljays.com/posts/a-practical-guide-to-choosing-a-silicone-valve-seal-for-modern-product-designs
Custom parts can help a product feel easier and cleaner to use. The one piece valve is a strong example because small changes can affect the result. The right design can reduce waste and improve control