Mix together the baking soda, citric acid, and cornstarch in a small mixing bowl, breaking up any lumps. The baking soda and cornstarch help hold together the bombs, while the citric acid gives the refreshers a bit of fizz.
Slowly add the essential oils, and mix. Orange is a great scent that calms while refreshing. Lavender rejuvenates along With the lemongrass. Give the mixture a spritz of water, and then stir. Continue spritzing and stirring until the mixture resembles wet sand.
Now press into silicone molds, and let set until dry, which can take up to eight hours. Carefully pop out of molds.
The next time you need a bit of rejuvenation, toss a Shower bomb in the bottom of your Shower and enjoy the wonderful scent. You can even add to a bath for an invigorating soak.