Take a dog frisbee, kick it up a few notches, and you’ve got the Zisc®. Ziscs are easy on canine jaws, but don’t skimp on durability. These fast-flying discs bounce, float, and clean up in the dishwasher. Zisc Glow stretches fetch deep into the night, while still being completely doggie-safe, durable and recyclable. Just put in a window or under a bright light for five minutes and you're good to glow.