We have recently added Fulfillment as a new service here at ScreenPlay. We have been successful at printing almost every substrate we have tried. We are limited to one color images and an image area of 3" in diameter. Pad-printing allows us to print on round or uneven surfaces. Some common printable items are pens, golf balls, clocks, bowls, and pretty much anything else you can think of. We will always need one piece to test on so make sure you factor in an extra piece.