Hello all I have a green bottle f EIC that is functioning in room temperature as well in sunlight &one copper ring is also there . FUNCTION- water level increases 1 inches in jst5 min in room temperature awellss in sunlight. No demand only genuine price so contact me direct buyer and no wastage f time .contact - 7568831645,9784608429. Thank you NOTE - The bottle I'd washable by eno & half I .sell urgently contact me fast .