i have green coloured waterbottels of height 12 inches functions are its water level increases when kept in sunlight if water filled upto 8.5 inches water raised near about half inch in 60-70 minutes. if water filled upto the neck of bottle at 10 inches its water raised 1inch in 60 minutes. the bottles are near about 150 years old. ALL THE FUNCTION IS ONLY WHEN KEPT IN SUNLIGHT. PLEASE CONTACT ALL THE GENUINE PARTIES. MY CONTACT NO. IS 09829836909 09729971384 09634094932 09816087168