Can I have multiple subscriptions or add products to an existing subscription?

You bet!

To create an entirely new subscription that will be added to your account, follow the steps here.

To add products to an existing subscription, log your account and click “Subscriptions", then "Your Subscriptions". From there, select all of the available products you would like to add to your subscription. You can adjust the shipping frequency once the product has been added to your existing subscription.