All of our flying lantern, sky lantern, flying paper lantern, Sky paper Lanterns, sky paper light, halloween flying lantern, are very safe to use, however, they must be operated in accordance with our safety and launch instructions, Each lantern is individually packaged for protection and comes with its own instructions for use. The Lanterns have an easy to light non drip, non hazardous fuel cell, and the lantern body itself is manufactured from flame retardant cotton paper. These lanterns can fly to a height of between 800-1000 metres for a duration of up to 12 minutes.