LED Reusable Twist Glow Sticks are great for festive occasions and emergency use. Twist on/twist off function allows you to use them multiple times. They last up to 60 hours and are eco-friendly, nontoxic and contain no harmful chemicals. Water-resistant, impact-resistant glow sticks float in water. Carabiner clip easily attaches to most loops. Child safety screw prevents children from swallowing the small, button cell batteries that power the glow sticks. Adults can easily replace the cell batteries for continued use. 7-3/4" glow sticks help reduce landfill waste and are perfect for disasters, blackouts, emergencies, camping, fishing, hunting, hiking, parties and more.