Color WhiteMaterial free BPA FreeItem Weight 0.87 PoundsBottle Nipple Type NaturalWave NippleAbout this itemGREAT FOR NURSING MOMS- These breastfeeding bottles with NaturalWave Nipples are clinically proven to reduce nipple confusion so babies can switch back and forth between the breast and bottleCLINICALLY PROVEN TO REDUCE NIPPLE CONFUSION- The NaturalWave nipple is clinically proven to reduce nipple confusion. Baby can easily switch from bottle to breast and back againEASY TO USE AND CLEAN- These dishwasher safe baby bottles only have four pieces and can easily be cleaned and reassembled as often as needed. They're also BPA and BPS freeAIR VENTILATION SYSTEM- Our NaturalWave nipples are designed to reduce intake of air and potential causes of gas associated with colic to help baby while bottle feedingPACED FEEDING COMPATIBLE- These nursing bottles enable baby to engage in the same natural sucking actions learned at the breast to maintain established breastfeeding patterns. Slow Flow (2S) silicone nipples allow baby to control milk flow