Celebrate the start of summer with a Vistaprint custom T-shirt—now just for $5.99. Even sweeter, new customers can also get free shipping on these T-shirts, making them just $5.99 shipped right to your door.  Just use the promo code MYSHIRT at checkout! These T-shirts usually run for $10, so make sure you take advantage of this limited time offer. This deal is valid today, July 1st only!