The image on our Shark Coasters could get adrenalin pumping. A solitary great white swims above the ocean floor in a photo with varying hues of blue. Growing to over 20 feet in length and almost 5000 pounds, they are sensitive to half a billionth of a volt of electricity, which is their primary means of detecting prey. Now with this foundational data in mind, a Shark Coaster Set is an ideal gift for a fish enthusiast or an electrician. The package includes four drink coasters in a clear hinged storage box. Each coaster measures 3.5 x 4.5 inches, and has a poly canvas surface and rubber base, making it safe to navigate the waters of pre-dinner conversation.