These inner bags for baby bottles are convenient because they don't require sterilization or washing. - Product Name: Baby Bottle Inner Bags - Features: No sterilization or washing required - Brand: meiji - Product Name: Rakuraku Milk Attachment Thank you for viewing. --------------- The attachment is new, unused, and not for sale. I used about 2 of the 20 inner bags. The package has been opened. Please refrain from purchasing if you are concerned about this.