Add salt (if using) to bottle. (salt helps disperse oils in water)
Add essential oils.
Fill with water.
Shake and use!
Feels delightful if kept in the refrigerator but that isn't necessary!
I have one in my pool bag, my purse and in my fridge.
Notes
If you don't use salt, just give a good shake before using! Young Living has several types of Eucalyptus oils. I just use whichever one I have on hand. Eucalyptus Globulus is my favorite!