Crazy Nut Milk Bag The Crazy Nut Milk Bag works with all types of blended nut milks. This nut milk bag is made from 100% nylon material with external, easy clean seams. The Crazy Nut Milk Bag is manufactured using food grade material for use with nut milk. This nut milk bag can also be used as a sprout bag for salad lovers. The Crazy Nut Milk Bag can also can be used as a cold brew coffee filter.