Well, you can make a roll-on cologne with essential oils and a carrier oil like: Jojoba, Meadowfoam seed, Avocado, Castor or Sweet Almond. I prefer to work with Meadowfoam seed and Jojoba.
And you can make a cologne spray with essential oils (or perfume oil if you prefer) distilled water and clear vodka. Any ol’ cheap shelf vodka will do.
I should really do some tutorials. I’ve already got several people curious as to how I make them.