NEW! I.O.D. stamps.The new Knob Topper Stamps are designed to use on any round, curved or domed objects! Aren’t they just DARLING?! One of the reasons we designed these is to give you guys SO MANY options between designs ( mix them up and layer them ) and colors ( you can use any medium or color with the Knob Topper Decor Stamp set!! ) . Endless options.