These come wrapped in bio-film a plastic alternative made from corn that is biodegradable and compostable. Colorful, fun, fizzy, and relaxing our bath bombs are full of beautiful and safe ingredients that feel great on your skin and make for a wonderful bath time experience. To use: just run your bath as usual. Slip in to relax and drop our bath bomb into your water and watch it fizz. Ingredients: baking soda, citric acid, sunflower oil, european spa salt, corn starch, buttermilk powder, cream of tartar, fragrance, red 27, blue 1. All of our colors are FDA batch-certified dyes. They are water-soluble and will not stain your bath tub!