Measure and sift 2 1/2 cups of sodium bicarb and 1 cup of citric acid and set aside in separate bowls. Also, measure 48 drops of eucalyptus essential oil and 48 drops of peppermint essential oil and sit aside for now.
Next, measure 1 tsp of cream of tartar.
Add the cream of tartar to the bowl with sodium bicarb and mix together with a spatula.
Pour the citric acid into the bowl with the sodium bicarb and cream of tartar and stir with a spatula or spoon.
Now, add in a hand full of rose petals, break them up into small pieces if they are too big.
Gather a hand full of calendula leaves and mix them into the shower steam and rose petal mix and stir. Now is a good time to add some of the rose petals and calendula leaves to the bottom of the mold.
Take the essential oil mixture (castor oil, pepermint & eucalpytus essential oil) and mix it into the shower steamer mix and stir.
Spray the shower steamer mix with 91% alcohol to moisten the mixture until it feels like wet sand.
Fill the silicone molds with the shower steamer mixture. Let sit for 24 hours for the mixture to dry before using the shower fizzers in the shower.