Medelas supplemental nursing system is intended for long-term supplemental feedings and uses gravity to encourage the flow of breast milk from its container to your baby. Moms seeking a disposable, short-term solution may benefit from our Starter SNS (sold separately), which is a lactation aid feeding tube and baby feeding system intended for 24-hour use when short-term assistance is needed. As with every Medela product, our SNS is designed with you and your baby in mind so you can feed your little one with breast milk for as long as you choose.