One of the most popular promotional swag items: Push Privacy Camera Blocker
The Push Privacy Camera Blocker is perfect for protecting your digital life from hackers spying on you and for avoiding scratches on a camera. Simply align it to your webcam, attach and press firmly for a few seconds for a strong seal. Then simply slide over to block or unblock the camera. The thickness also doesn't prevent laptops from closing perfectly and it's compatible with most electronic devices with a camera.