You answer:

That's a really cool idea! I believe that your team will be happy to get something like that. Well, at least, I'd be if my employer gave me a t-shirt with our company logo and brand name. You can check ut Printful, I know that these guys help people make custom clothing, and I think they can take big orders as well. I used to order a custom hoodie there, so I guarantee that the quality is really good there.