mid-range price: liquid concentrate (you mix it with water once mixed, it’s typically refrigerator safe for up to 48 hours).lowest price: powder (you mix it with water and must use within 1–2 hours of baby starting bottle, depending on brand and type).Formula comes in three formats, each with different price and convenience factors: One characteristic of formula that affects price is preparation. Switching too often can prevent your baby’s tummy from having a chance to adjust. Your pediatrician may recommend sticking with a particular formula - regardless of brand - for a few weeks rather than switching prematurely. Some symptoms, like spitting up and occasional constipation or gas, are just par for the newborn course. That being said, an infant’s digestive system is still developing. Talk to your pediatrician about switching types or brands of formula if you see signs that your baby isn’t accepting their formula, such as: The point to note here is that both brands have formulations to address a variety of needs.