1. Wash, rinse and dry canning jars.
2. Empty one carton Epsom Salts into large mixing bowl or batter bowl. Add 3 cups sea salt, stir well. Stir in 1/4 teaspoon glycerin and 6 to 8 drops essential oil. Mix well.
3. In second large mixing bowl, empty one carton Epsom Salts, and add 3 cups sea salt. Stir well. Add 1/4 teaspoon glycerin, 6 to 8 drops essential oil, and food color. Stir until completely blended. Color should be even.
CEO's tip: use a heavy-duty stand mixer (such as Kitchenaid-brand) to mix bath salts easily. Set mixer to lowest setting and mix until color is even--but don't try this with hand mixers or smaller stand mixers!
4. Holding canning jars at an angle, layer salts in jars, alternating white and colored mixtures.