I'd doubt that it includes the shirt given the price. That brand of shirt would retail for at or very close to the $35.00 price tag and if my theory is correct, you would need to wear the same shirt whenever you do the effect or else have several shirts at the ready that are pre-set.
Not saying that I know for fact what's up but I have a good theory as to how I'd pull of such a routine. Regardless, it is clever and fun, if I were still working I'd probably buy it for sidewalk bits or casual fun during a small house party or mixer.