Includes: 2 pcs of 5 oz baby bottles with Slow flow nipple, 2 pcs storage caps; Premium Borosilicate Glass: without BPA, BPS, Phthalate and toxins. Heat-resistant, making it a peace-of-mind option for parents; Great for Nursing Moms: ultra-soft nipple mimics natural feel, flex and ...Includes: 2 pcs of 5 oz baby bottles with Slow flow nipple, 2 pcs storage caps; Premium Borosilicate Glass: without BPA, BPS, Phthalate and toxins. Heat-resistant, making it a peace-of-mind option for parents; Great for Nursing Moms: ultra-soft nipple mimics natural feel, flex and movement of breastfeeding, helps breastfed baby naturally latch on, anti-colic vents allow your baby to drink continuously without gasping for air or drinking bubbles; Slow Flow Rates: 5oz/160ml baby bottles with Small flow nipple perfect for newborn babies; Easy to Clean: these wide neck baby bottles only have 4 pieces and can easily be cleaned and reassembled as often as needed, Sterilized in bottle warmer, microwave, sterilizer and boiling water.