Three specially designed NurturePure™ PureFlo™ Level 3 silicone nipples. Recommended for children 6+ months of age. Our PureFlo™ nipples are designed with special air flow vents that decrease the amount of air ingested to provide comfort from gas and colic symptoms.All of NurturePure™ brand nipples are soft and natural - made from food-grade silicone and are latex-free, allergen free and free of nitrosamines.