I would test the product and then give a fair and honest review in a post dedicated entirely to that product. The post would include all links to the product and your business. This would give my readers all the information they would need to purchase your product should they choose to do so.
I don't charge for the review but would need the physical product sent to me for review. The product however will not be returned.
The review depending on the subject matter would also be shared on one or all three of my Facebook Pages: Hibiscus House and Dolly's Designs
I already do reviews on certain products that I use on a daily basis and it would be a privilege to do one on your product or business.
Feel free to contact me: firstname.lastname@example.org