Medela辅助喂奶的，这两个哪个好？ 请大家给个意见，谢谢

还有一个月就生了。这两个的区别是单管和双管的区别么？谢谢

http://www.amazon.com/Medela-00901S-Supplemental-Nursing-System/dp/B002Y2NFBI/ref=sr_1_4?s=baby-products&ie=UTF8&qid=1351531333&sr=1-4&keywords=medela+Supplemental+Nursing+System%E2%84%A2+%28SNS

 

http://www.amazon.com/Starter-Supplemental-Nursing-System-Bottle/dp/B001G87KYE/ref=sr_1_2?s=baby-products&ie=UTF8&qid=1351531333&sr=1-2&keywords=medela+Supplemental+Nursing+System%E2%84%A2+%28SNS