Pre-sterilized Disposable Bottle Liners are easy to use and easy to fill. Your baby gets a fresh bottle for each feeding. Sure hold grip tabs make feeding time even easier. Ideal for storing and freezing breast milk. Write-on feature for baby's name, date and time you prepared baby's bottle. Easy dispense package -just thread first liner through dispensing slot on back panel until next liner shows, tear off at perforation. These liners are the strongest you can buy.