A blend for respiratory problems 2 drops of Lavender, 1 drop of Rosemary, 1 drop of Basil, 1 drop of Peppermint, blend in an emulsifier and add to a steam bath. Never pour essential oils direct or undiluted in water or to your skin: mix a few drops of essential oil in a base oil, whole milk or cream, and add it to bath water, or a shower gel. 5 to 10 drops of essential oil are sufficient per 10ml of base oil.