I decided to try something I found in this book:
It has all sorts of recipes for various natural remedies and concoctions, including eau de cologne and toilet water. The basic ingredients are essential oils, vodka, and distilled water.
As a life-long Baptist who doesn't drink, I felt extremely out-of-place going into a liquor store to buy the vodka! But I felt proud of myself that I didn't confess to everyone there that I was buying the vodka for a project and not for drinking.
I didn't follow the book's directions exactly, as I used the scents I wanted in the proportions I wanted. (As a migraine sufferer whose headaches are often triggered by scents, I had to go with what I like and can tolerate.) Now it's a waiting game. The instructions for the toilet water say for it to sit for 2 weeks, being shaken daily. The eau de cologne sits for 4-6 weeks with daily shaking. The toilet water is colored with food coloring, per the book's instructions. I made lavender, which is in the book, but also peppermint, as that's a pick-me-up scent that actually helps me when I get migraines. I'm thinking of using it more as a room spray, though, than on my skin. I used lily-of-the-valley and French lavender for the eau de cologne.
It's not the cheapest of experiments, but I already had the essential oils, so I just had to purchase the vodka. If this works out, I think it'll be well worth the cost of materials. If not, well, it was worth a try.
Guess I'll let you know in a few weeks how it turns out!