This starter set includes two 8 oz/250 mL and two 4 oz/120 mL Options+ narrow glass bottles, four Level 1 slow flow, two Level 2 medium flow, and two Level 3 medium-fast flow silicone nipples, two storage/travel caps, one 8 oz and one 4 oz protective silicone bottle sleeve, a bottle brush, and a Dr. Brown's HappyPaci 100% silicone one-piece pacifier (0-6 months) shaped like a Dr. Brown's bottle nipple. The clinically proven anti-colic vent system reduces colic, spit-up, burping, and gas, and can be removed as feeding develops so there is no need to introduce a different bottle. Glass bottles are heat- and thermal-shock-resistant; all included items are BPA free and top-rack dishwasher, sterilizer, and boiling-water safe.