Keep your Haakaa Breast Pump dust-free between uses and your breastmilk safe from airborne nasties with the Haakaa Silicone Breast Pump Cap! It is compatible with all of our breast pumps to prevent spills, and helps to keep them clean and hygienic between uses! This cap is made of 100% food-grade silicone and fits securely over the top of your pump's flange to keep your milk safe, secure, and free from dust and other airborne contaminants.