From Microsoft & Cafepress:
“Bring your Xbox LIVE Avatar to life & share it with people in the “real” world. When you’re sporting your own fun Avatar on gear, who knows who you’ll bump into (and be recognized by — because of your Avatar!). It’s easy to make yours, just pick from the many poses. Then order your stylin’ Avatar on t-shirts, drinkware and more.”
Order Here –> Custom Xbox Avatar T-Shirt
The Road to Know Where 