Where can you buy coffee cup tom selleck uses on blue bloods?

You can purchase the coffee cup that Tom Selleck uses on "Blue Bloods" through various online retailers, such as Amazon or eBay, where fans often sell replicas or similar styles. Additionally, some specialty stores may carry similar mugs inspired by the show. For exact replicas, checking fan merchandise websites or dedicated "Blue Bloods" memorabilia sites could also yield results.