Popyum Orange 7 Piece Bundle: 9oz Bottle 3-pack + 2 Nipple 2-packsIncludes three 9 oz (260 ml) bottles with #2 medium flow anti colic nipples. Includes two stage 3 fast flow and two stage 4 extra fast flow nipples. Stores formula and water separately for on demand mixing. Activates by pressing the buttons and shaking to combine contents. Designed for one handed use to help with feeding and multitasking. Keeps breast milk isolated in the bottom chamber until released. Prevents milk from contacting nipple leak points