5 oz. | bath bombs are made with the same non-staining organic coloring and all hypoallergenic ingredients as our Bubble Rubbles, but with more fizz and fewer bubbles. Serenity smells spa fresh with a pleasant balance of sage and mint essential oils. Place gently into warm bath water to create the best bath time experience. Ingredients: Baking soda, citric acid, epsom salt, Essential oils (sage, mint).