Not all suction cups are created equal according to Anver Corp., Hudson, Mass., (anver.com). Selecting the right material and size is key to finding a suction cup for a task. For example, silicone cups work well at high heat, nitrides are fine for general purpose tasks, polyurethane blends provide abrasion-resistance, ESD silicone works best on electronics, and gum rubber handles paper well. A proprietary, silicone-free, no-marking hybrid handles hot items, and vinyl is good for light duty.