Pure Bliss by Similac Infant Formula with Iron, 24.7 ounce (700 g), 3547 calories. Pure Bliss by Similac is a milk-based powder infant formula with iron that provides complete nutrition for your baby's first year with over 25 key nutrients including DHA & ARA (like those found in breast milk) to support brain and eye development. The formula contains no artificial growth hormones and no antibiotics, and is gluten-free. The formula ingredients are Non-GMO (not genetically engineered), Halal and Kosher.