Direct to cart URL

We use sitefinity as our CMS and ecommerce. Anyone knows if we can create an URL that directs customers right to the shopping cart with a specific course (we sell online training courses) already added to cart? I know we can direct them to cart with discount code applied by adding "redeem?code=xyz" at the end of the link but not sure how to have a specific course/product already added to cart with a custom URL