One-time products can be added to your subscription order. Login to your customer portal to add products: Click the Subscriptions tab and select Edit next to the subscription you want to add a product to.  Hover over the product you want to add and select Add one-time. This automatically adds the product to your shipment.  You can also add one-time products using the Add a Product button on the Subscriptions tab. To manage or delete a one-time product: Click the Delivery schedule tab. Select Manage add-on.