GOGO 10 Pcs Plastic Sporting Safety Whistle With Lanyard & Hook, Pealess - Blue 10 Pcs 100% made of high-impact ABS plastic Nylon detachable neck lanyard with metal lanyard hook and swivel 3 aerodynamic wind chambers delivers a sharp clear tone with less effort No cork ball and no more moisture and germs being absorbed into the cork surface Ideal for PE and recreational classes and party favors