Fill the glass the rest of the way with liquid castile soap and stir to mix.
To use, pour the shot under running water. Relax and enjoy!
Notes
*Some of our favorite essential oils for relaxation and stress relief are suitable for use in a bathtub. (Avoid hot oils with a low dermal limit.)These include geranium, ylang-ylang, clary sage, marjoram, rose, and Roman chamomile.