To make poo pourri with essential oils, you will need a small spray bottle, witch hazel, essential oils of your choice (such as lemon, lavender, peppermint, or bergamot), and distilled water. In the spray bottle, mix 1/4 cup witch hazel and 20-30 drops of essential oils. Fill the rest of the bottle with distilled water, leaving a little bit of space at the top. Shake the bottle well before each use, and spray a few times into the toilet bowl before using it. The essential oils will create a barrier on the surface of the water, trapping odors below.