Product bundles represent the package a customer buys to provision a resource. As a service provider, you have to create product bundles which include specifying a service instance, resource type, entitlements, and charge frequency. You can create product bundles for your customers from the CloudPortal Business Manager.
If you select the checkbox for unlimited entitlement and then select the product, you are able to give unlimited entitlement even for a product that is not set to give unlimited entitlement.
Post requirements: You have to publish the bundle and activate it for the bundle to be visible to the channels