●Material: made of water-repellent nylon. Leak-proof interior, easy to clean. (Bag Only) ●Capacity: This breast milk cooler bag fits four 4-5 ounces (120-150 ml) breast milk bottles. Please note that it fits bottles without nipple and protective cap. ●Note: An ice pack helps to keep the bottles separate and cold. (We only sell bags. Ice packs and bottles are not included.) ●Details: Sturdy carry handle for easy carrying. There is also a small front pocket for name and date card. ●DIMENSIONS: 6" x 6" x 4.7", fits most brands chest pump carry bag or backpack.