Thinkbaby starter set, the new thinkbaby starter set is the perfect gift or start set for any parent. The set includes 4 baby bottles and six nipples. The 5 ounce baby bottles are outfitted with slow flow cross cut nipples (designed for 0 to 3 months). The set also contains 2 of polypropylene 9 ounce baby bottles with medium flow nipples (designed for 3 to 6 months). And finally thinkbaby has included 2 fast flow nipples (designed for 6 to 12 months). All of the nipples feature thinkbaby"s simple one piece, anti colic design. Anti colic systems help reduce the incidence of gas and spit up by reducing the vacuum pressure created while your child is drinking. The unique system is easy to clean with no extra parts to worry about. All of the bottle parts can be washed in the dishwasher. Thinkbaby recommends utilizing the top rack. With the starter set, you get every speed of nipple (all nipples are labeled Level 1, 2 and 3 for easy identification). This will provide you with the ability to see which flow rate works best for your little one, as all children feed at different rates. This also means that if you purchase this for a gift, you won"t have to concern yourself with making sure that you"ve purchased the appropriate product. The ultimate in green Transform your thinkbaby 5 ounce or 9 ounce bottles into our trainer cup with our conversion kit. All thinkbaby products are free of bisphenol A (BPA), nitrosamines, PVC, lead, phthalates, melamine, and biologically harmful chemicals. thinkbaby does not use plastic windows into products. Most of these are made from PVC and therefore could leave a residue on the bottle. Second, thinkbaby feels it unnecessarily adds to the plastic footprint. thinkbaby uses third party laboratories and audit firms to ensure that our products adhere to our strict chemical standards. The perfect gift.