Spectra replacement bottle for breast milk collection and storage fit wide neck Spectra flanges for your pumping convenience. BPA free 5 ounce bottle embossed with ounce markers. Compatible with flanges included with Spectra S1, S2, S3, SG and S9 breast pumps. Lactation Connection is a Spectra authorized retailer. Genuine Spectra bottles. Spectra Nipples sold separately.