Place the nuts/seeds/oats/hemp, etc and 4 cups of cold water in blender (I measure the water first using the measurements on the blender and then place the nuts/seeds/oats/hemp, etc in with the water). Blend on high for 3 minutes if using a regular blender, if using the Vita-mix blender, 30 seconds is enough. Stain through a Nut Mylk bag (squeeze the bag a little to get all the liquid through) or strain in a fine mesh strainer, pushing it through with a spoon or a spatula.