Spectra Disposable Breast Milk Storage Bags with Temp Sensor hold up to 6.76 ounces (200ml) of breast milk. They are self-standing, so you can easily store them upright in your freezer. With its double lining and tight seal, you can be confident that your breast milk is protected from spillage. The measurement on the front of the milk bag lets you see at a glance how much milk it contains. The bags also now come with proper temperature indicators. Contents: 30 pcs BPA-free breast milk storage bags Features: • Self-standing • Pre-sterilized • Double-lined • Re-sealable • Temperature indicator