Papablic new direct pump bottle adapter (for use with Spectra S1, Specta S2, Avent Breast Pumps) breastpumps to pump directly into Comotomo baby bottles. If you often use comotomo feeding bottle while you are using Specta or Avent breast pumps, this bottle adapter will help you pumping directly. No milk loss due to transferring from collection bottles to feeding bottle, which make feeding baby more convenient. This adapter for Spectra and Avent is only sold as a 4 count.