DIY Projects & Crafts Bath Bombs and Soaps Bath Fizzies in a Jar Learn how to make bath fizzies, stored in a glass jar using citric acid. Thread a gift tag with ribbon, and tie it around the jar as handmade gift. By Martha Stewart Editors Martha Stewart Editors An article attributed to "Martha Stewart Editors" indicates when several writers and editors have contributed to an article over the years. These collaborations allow us to provide you with the most accurate, up-to-date, and comprehensive information available.The Martha Stewart team aims to teach and inspire readers daily with tested-until-perfected recipes, creative DIY projects, and elevated home and entertaining ideas. They are experts in their fields who research, create, and test the best ways to help readers design the life they want. The joy is in the doing. Editorial Guidelines Updated on May 26, 2020 Share Tweet Pin Email Add these bath fizzies in a jar to your bath time routine for a colorful pick-me-up. Ice-cube trays serve as molds, giving the fizzies their shape. Using a flexible silicone model lets you slide the cubes out smoothly without breaking them. Pack each type of fizzy in a separate jar so the scents won't meld. Write the name of the scent on a vellum tag (choose a shade that matches the fizzies), and punch a hole in the top. Thread the tag with ribbon, and tie it around the jar. Citric acid, a common food additive, is available at wine-making-supply stores, some spice shops, and online. When citric acid is combined with baking soda and placed in water, a chemical reaction creates bubbles. This recipe makes one dozen; we recommend using two per bath. What You'll Need Materials 1/2 cup citric acid 1 cup baking soda 3/4 cup cornstarch 1/4 cup organic cane sugar About 6 drops food coloring 10 to 15 drops essential oil(s) 2-ounce travel-size spray bottle ($1.99, ulta.com) Plastic pipettes ($2.09, michaels.com) Silicone ice-cube tray ($8.99, bedbathandbeyond.com) Storage jars Instructions Stir together the citric acid, baking soda, and cornstarch in a glass measuring cup. Pass the mixture through a fine sieve or a flour sifter into a mixing bowl and stir in sugar. Fill the spray bottle with water and add the food coloring. Then spritz mixture lightly (it should become damp but not fizzy) until you can pack it with your hands. Using a pipette, add oil, one drop at a time, until the strength of scent is to your liking. Using a metal spoon or your hands, mix ingredients until the color is even throughout. The mixture will begin to dry out; when this happens, spritz until it's packable again. Spoon the mixture into the ice-cube tray, pressing firmly. Let it dry at room temperature overnight. Pop it out of the tray gently the next day and transfer to jars.