Come and see our amazing products. The whistle is made of aluminum with key ring. Easily attaches to their keys, purse or bag using the silver split key ring. It's excellent for camping, hiking and outdoor activities. Simply add your company's name, logo and advertising message before handing it out at tradeshows, expos, conventions and any other marketing opportunities to pop the top on your next advertising campaign. Pls confirm further with us if any query about packing info, inventory status and time schedule.