Breastfeeding is best for your child's healthy growth and protects against diarrhea and other illnesses. Use this product only if breastfeeding isn't possible or suitable. WHAT YOU GET: 5 x collection (storage) bottles 4.7oz/140ml, 5 X Screw Rings, 5 X Sealing Disks, 5 X Nipples, 5 X Dome caps. Incl. wide-neck collection bottles compatible with Avent manual, Avent Electric Breastpump , Spectra s2 (plus), Spectra s1 (plus), Spectra 9 plus pumps; also suitable for Bellababy pump BALL-PEN WRITEABLE TOP - The SureSeal silicone top can be marked with a ball-pen, and removed with soapy water. You can date the bottle to know the age of the contained milk, or name the bottle so no mix-up in the daycare refrigerator; ANTI- COLIC NIPPLE: Reduce intake of air. Made with 100% soft and flexible silicone. MAYMOM DOME CAP: Work with Spectra widemouth, Lansino widemouth, Maymom widemouth and Pigeon widemouth screw ring. Serve as Measuring Cup: Maymom's Dome Cap comes with approx. measurement marks and it has a flat bottom to serve as a cup. 100% LEAK PROOF & 5-mL FINE MEASUREMENT MARKS . Incl. silicone SureSeal (TM) sealing disc so no leak at all; The bottle has 5-mL incremental measurement marks. You know exactly how much milk you have produced. The World Health Organization recommends breastfeeding for at least 6 months, and ideally up to 2 years. Using a feeding bottle may cause your baby to stop breastfeeding. Cup feeding is a cleaner option. Maymom Wide-Mouth Milk Storage and Feeding Collection Bottle with Nipple, Dome Cap, Bottle Top, SureSeal Sealing Disk; Compatible with Spectra Pump/Motif Luna; 5 pc (4.7Oz/140mL) Breastfeeding is best for your child's healthy growth and protects against diarrhea and other illnesses. Use this product only if breastfeeding isn't possible or suitable.