Is there a way to handle this?

A customer buys a product say, $29.95.

Is there a way at the time the item is placed in the basket or when the customer proceeds to check out, to show them that they can upgrade to the Bundle Package or add the Accessories Pack for just $xx.xx more?

There is a "Customers who purchased this, also purchased this" at the bottom of the catalog page but that is not enough.