DayCarrier Kit by Medela Allows mom to drop off a full day's supply of breastmilk for baby's feedings and keep another cooler carrier with her. Insulated, discreet black cooler carrier cools and stores up to 4 containers. Even has a slot on top for an ID and a leakproof liner. Can also be used to keep baby food jars or drinks chilled for trips or travel. Includes 4 polypropylene Medela breastmilk containers; 4 two-piece lids for feeding and 4 solid lids for the safest storage; 4 orthodontic slow flow nipples, 2 caps and cooling element.