Combine baking soda and water in a small bowl. Mix well.

Add 20 drops of desired essential oils to mixture. Stir until well combined.

Pack mixture into small silicone molds of your choice and allow to set overnight.

To use, place a tab in your shower away from the direct flow of water and enjoy the cooling effect of the vapors.

Store in an airtight container. This will help prevent the volatile compounds of the oil from evaporating into the air. Be sure to use within one week.