LUSH Intergalactic Bath Bombs have an incredible production process that starts with essential oils that won't irritate the skin and pretty colors to make your bathtub astonishingly galactic at contact. Add in some luster for sparkle and sodium bicarbonate (baking soda) for fizz, and you got yourself an incredibly special bathtime ritual. Refinery29 took a trip to the LUSH Cosmetic factory to see how our favorite bath bombs are made.