It looks a bit like the coolers used to keep drinks fresh on a sunny day but the chill box being tested in sweltering Mozambique serves a higher purpose -- saving lives from malaria. The new cool box is intended to keep malaria medicines at 25 degrees Celsius (77 degrees Fahrenheit) or below in impoverished rural areas without electricity where temperatures can reach 45 degrees Celsius. As the world marks Malaria Day on Friday, its developers hope the cool box will help save some of the one million lives lost to malaria worldwide every year -- 6,000 of them in Mozambique alone.