Event Lanterns Eco Friendly Sky Lanterns (Pack Of 10) Purple Event sky lanterns are environmentally friendly and 100% biodegradable. (no metal wires) Easy to light and can be launched in 1 minute. 10-12 minutes flight time. Can reach 2000+ ft. No assembly required, attached fuel source, flame retardant, fireproof string, and bamboo ring. Simple to use! light the fuel cell, watch it fill with air and let it go into the sky. Made from the highest quality materials and individually wrapped for safe and long lasting storage.