Adiri Natural Nurser Ultimate Baby Bottle - Don't forget the warming caps!  The AdiriTM Natural NurserTM Ultimate Bottle is 100% BPA and polycarbonate-free. All materials used in the bottle meet FDA requirements and none contain any bisphenol-A (polycarbonate component), phthalate plasticizers or vinyl chloride. The Adiri™ Natural Nurser™ Ultimate Bottle is simple, soft and safe. The Adiri Natural Nurser has a unique co-molded nipple and bottle body that prevents lost parts and assembly hassle. Nipples are not sold separately. No additional parts are required. All stages hold 8 ounces and are dishwasher safe! A sleek cover protects the bottle from getting dirty and prevents the nipple from leaking during transport. Stage One (slow flow) is generally used for premature and newborn babies up to 3 months old. Stage Two (med flow) is generally used for babies anywhere from 0 to 6 months old. Stage Three (fast flow) is generally used for babies 6 months old and older. Note: Our stage one Adiri Natural Nurser is designed to be appropriate even for premature babies, and as such we have found that the flow is slower than average for stage one bottles. If your baby is already feeding quite well from the breast and/or bottle and you are unsure if your baby needs a slow or medium flow bottle, we recommend you try the stage two medium flow Adiri Natural Nurser. The Adiri Natural Nurser Two Pack includes 2 bottles of each stage. The Adiri Natural Nurser Multi Pack includes 1 bottle of each stage.