Provide toothpicks for your friends to flavor their lemonade using this simple technique: dip the toothpick tip into your essential oil of choice, then swirl it into the liquid. Believe it or not, just this tiny amount of oil does the trick to flavor the entire glass. A diverse collection of essential oils is key to making this lemonade bar a tantalizing one! Consider setting out the following dōTERRA oils for the dip-and-swirl technique: Basil, Lavender, Geranium, Ginger, Grapefruit, Lime, and Yellow Mandarin. This list is by no means exhaustive, just a flavorful starting point.