thinkbaby’s baby bottle nipples simply are the ‘next best thing’. These recyclable eco-friendly nipples are free of: Bisphenol-A (BPA), phthalates, nitrosamines, lead, PVC, PET, Tritan and biologically harmful chemicals. The makers and parents at thinkbaby have thought of everything when it comes to cost and safety for your little one. This ten pack comes with two slow flow, 2 medium flow, and 2 fast flow nipples. Each are made with ventilated, medical grade silicon nipples perfect for babies all the way up to 9 months. In an effort to expand your environmentally conscious horizon, the makers at thinkbaby have created four different nipple flow rates and sizes so that your bottle can “grow” with your baby all the way into toddler age. The thinkbaby bottle is easily converted into a sippy cup with the purchase of an affordable conversion kit. This not only reduces the amount of bottles you will have to buy, but also the amount you will have to throw away, a break for your pocket book and our environment to ensure a healthy and conscious start for your baby. These eco-friendly nipples also come with 4 caps to keep your babies goods clean. Dishwasher and microwavable safe, and come with two slow flow nipples. (2-5oz slow flow, 2-9oz medium flow,2-fast flow nipples,4-caps)