WIDE-MOUTH COLLECTION BOTTLES for SPECTRA S2, SPECTRA S1, SPECTRA 9PLUS PUMPS. Contains 4 breastmilk collection bottles. 9 OZ / 280 ML. PUMP INTO THESE BOTTLES WITH SPECTRA S2 Breastpump. Compatible with nipples and rings of SPECTRA bottles. ONE-PIECE CAPS. The cap/lid is in one-piece. Each cap is enclosed with 1 sealing ring to prevent leaking REUSABLE BOTTLES. DISHWASHER SAFE. Can be USED WITHIN TEMPERATURE of -20~100C. Made from PP and silicone. All parts can be sanitized with water steam or boiling water. These bottles are used but have been sterilized.