thinkbaby 5 oz baby bottle twin pack - Free of Bisphenol-A (BPA) and toxic chemicals. Patented venting system reduces incidence of gas and spit up.  Venting systems have been shown to reduce risk of middle-ear infections.  Worry-free transport: Travel cap minimizes spillages.Extra soft Nipples:  High grade silicone nipples provide easier transition from breastfeeding to bottle feeding.Dishwasher Safe: Top rack recommendedAnti-Colic Nipple 5 oz baby bottle Free of BPA Travel Cap Stage 1 (Slow Flow) Nipple Two bottles and stage 1 nipples per box Packaged in recycled materials