[ Clean & Care ] - Sterilize each colostrum collector before use with any steam sterilizing system or by boiling in water for 2-3 minutes. Do not use bleach-based agents to clean this product. [ Collect?Store?Feed ] - Colostrum collector has 3 major functions: harvest, store, feed. How to use: Soft squeezable collector has a vacuum effect to collect droplets, nib suctions colostrum off the nipple, syringe point can also be removed to express directly into collector. Store and freeze according to milk storage guidance. When feeding, just squeeze the collector to feed the liquid gold to your newborns. Use all the colostrum in the container for one feed and discard any left over. [ Perfectly Size 0.1oz/4 ml ] - 4 ml clear measurements. Each haakaa colostrum collector set incudes 6 pcs silicone collectors and a complimentary cotton wipe, together in a clear PP storage case. Portable, small, leakproof and reusable. Heat and freeze resistant. [ 100% High Grade Silicone ] - Made of 100% soft high quality grade silicone. BPA, PVC and phthalate-free. Non-toxic and safe for newborns. It stayed away from the nasty plastic smell and can be safely stored in the fridge or freezer. [ Benefits of Colostrum ] - ?Incredibly nutrient-dense. ?Contains high levels of antibodies to fight pathogens. ?Encourages your baby's first bowel movement.?Plays a vital role in your baby's early growth and development.