Function: Essential one-way valves that attach to the bottom of the breast pump connector or flange body. They regulate suction and allow expressed milk to flow freely into the collection bottle while preventing backflow.

Design: Feature a wide opening at the top and a flattened, duckbill-style tip at the bottom. This unique design creates an airtight seal under suction and opens smoothly when milk passes through.

Material: Crafted from high-quality, ultra-soft, 100% BPA-free food-grade silicone. Safe, non-toxic, and gentle for baby equipment.

Maintenance & Care: Wash gently with warm, soapy water (avoid sharp cleaning brushes inside the tip to prevent tearing). Replace every 1 to 3 months—or sooner if you notice decreased suction power or visible tears.