The phrase "powder formula" refers to a substance that comes in a powdered form and is used as a replacement for other products, such as baby formula or makeup, which are typically in liquid or cream form. Full definition
When it's time for your baby to eat, simply mix one bag of powdered formula with bottled water. (thespruce.com)
Or if you are mixing powdered formula with too much water, she may be drinking more of it in order to get the calories she needs. (babycenter.com)
You can store enough powdered formula in the airtight container to make 20 8 - ounce bottles and the water chamber holds 50 ounces of water at a time. (tinyfry.com)