Plop one of these in the toilet once a week for a constantly clean and fresh bowl. Better yet, make the kids do it! They'll love cleaning the toilet! Plop one in the bowl of the toilet and let sit for 10 minutes. Viola! Think of these as a bath bomb for the loo. Formulated with organic ingredients, we use Organic Tea Tree and Rosemary essential oils to keep things clean and fresh. Ingredients: Non-GMO citric acid*, aluminum-free sodium bicarbonate, tea tree oil*, witch hazel* and rosemary oil* *certified organic Comes in a box as pictured with 12 1”x1” tabs.