I believe many people have done one thing. It is when they go out to camp and find a bottle and have a glowing firefly as a lamp in the dark, similar to a lantern. The inspiration for this camping bottle comes from the firefly. Its power supply lid is equipped with a led lamp. The lid handle has a power generation function. It can emit 3 to 4 minutes of light every time the lid is turned three times. Bring this "firefly bottle" to meet the needs of water and lighting, a cup of dual-use, convenient and environmentally friendly.