Bath bombs are small round hard globes that are dropped into bath water to create a relaxing experience. The CBD bath bomb is made with a variety of ingredients that always include CBD plus some mixture of fragrances, herbs, essential oils like lavender or coconut oil, citric acid, sodium bicarbonate (baking soda), shea butter and other soothing items for the skin. Different brands have different mixtures, but all of them include CBD or CBD oil.