Organic Lavender Bath Salts Guarantee a few good soaks with bath salts you mix up and gift in test tubes. In a bowl, blend coarse Dead Sea salt and an organic skin oil, such as macadamia nut oil, with a spoon. Stir until the salts are saturated. (You want the mix to be neither runny nor dry.) Add a few drops of lavender oil and mix well. Divide into gift containers. Top with a pinch of lavender flowers, and seal the container.