1. In mixing bowl, combine baking soda and essential oils. Stir until well combined.
2. Gradually add water while mixing, just until moist clumps form.
3. Into a silicone baking mold or flexible ice cube tray, portion and press mixture.
4. Let sit for 24 to 48 hours, or until pods are firm enough to pop out of mold.
5. To use, tape 1 pod onto underside of trashcan lid. Replace each time you take out the trash.