To keep your smile sparkling all year long, we recommend signing on to a subscription. You can choose the frequency of subscription that works for you. For example, if you choose a delivery every 3 months, you would get a new shipment delivered to your door every 3 months. You are only charged once the product ships, and you will always get free shipping. You can cancel or make changes to your subscription at any time by logging in to your account. For more information, see our Terms of Sale.