Medela - Wide Base Nipples, 3-Pack: * Available in slow and medium flow * Small = Slow Flow Nipple Age 0 - 4 months, Medium = Medium Flow Nipple Age 4 - 12 months * Compatible with all Medela breastmilk bottles * Nipples may be cleaned in the dishwasher, Micro-Steamed, boiled or washed by hand * Can only be used with wide base collars * BPA free Questions about product recalls? Items that are a part of a recall are removed from the Walmart.com site, and are no longer available for purchase. These items include Walmart.com items only, not those of Marketplace sellers. Customers who have purchased a recalled item will be notified by email or by letter sent to the address given at the time of purchase. For complete recall information, go to Walmart Recalls.