Pack of 4: 180ml glass storage bottles: Making storing your milk easy and convenient, with a large capacity of 180ml each. Glass bottles are the perfect choice for storing breastmilk, as there is no need to worry about any harmful plastics contaminating your milk. These bottles are also more durable than plastic, and can be sterilised to higher temperatures. Practical Design: With the stable base to help prevent the bottles from falling over, and with a clear measuring scale, you can easily record the storage volume in each bottle. Dishwasher Safe: Here to make parents life that little bit easier, they are super easy to care for, just pop them in the dishwasher between uses. Microwave & Freezer Safe: Ensuring it is a hassle free process warming up your milk, and unproblematic to freeze with the lid opening with ease once frozen. Wide Neck: You can even use them whilst pumping, and then screw the lid on for storage., Manufacturer: Ana Wiz Ltd