Rytway Crystals Redi Instant Nonfat Dry Milk 50 Lb. for restaurants and foodservice operations. Instant Nonfat Dry Milk is a real dairy product. It is pure fresh milk from which only the milkfat and water have been removed. Once reconstituted, instant nonfat dry milk is the same natural product as fluid skim milk. Itâ€™s economical, easy to measure, dissolves instantly and completely, even in cold water.