I would like to purchase some promotional items online which can be branded with my company logo.
I was thinking of maybe pens or stress balls or maybe even mouse mats.
Can anyone help?
Hi, Jackie!
We would LOVE to help you with your promotional items! I'm not going to give you a long-winded sales pitch here, but feel free to take a look at our site if you're looking for some inspiration. We have tons of high-quality pens and hundreds of stress ball shapes! just let us know if you need any assistance – we have a Live help feature (to chat live with one of our Account Executives) or you can call us at 866-312-5646 or email us at . 
There are literally hundreds of companies that do this kind of work. if you don't mind a recommendation, I've included one in the source field below that I have had good results with.
As the previous answer stated there are hundreds, but for smaller quantities I have found vistaprint to be good