To add products to an existing subscription, log in to your account. From the My Account page, click Manage Subscriptions to view your active and paused subscriptions, then select Add a product located above your active subscriptions.
You will then be prompted to find and select a new product to add. *When searching for a product make sure to press enter after typing in your search query.
In the add a product menu, you can choose to add a one-time product or a subscription product.
The difference between a one-time product and a subscription product is the frequency. As the name suggests, a one-time product is only added to the specified upcoming order. You will not receive the item again in future recurring orders unless you manually add the product.
Once you have selected the new product you want to add, you can set the quantity, delivery schedule, delivery address and next charge date.