Hi, my bottle is 5.4 oz. I fill it with about 5 oz of water and I use about 3-4 drops of the peppermint oil because it’s really strong, but you can always adjust to your liking. I also will put either vitamin e oil, sweet almond oil, avocado oil. I usually rotate the oils out and I add 6-7 drops of one of the oils. I hope this helps!
