Daniel Zimmermann wrote:While copper might work better in your area, part of what makes this work in the slums this is designed for is that there's no material in it worth salvaging. Copper and aluminum are sellable for scrap,and it's not uncommon to see A/C units stolen for the metal parts (at least here in California).
Devaka Cooray wrote:
Hmm! How about this idea: maybe a bit more efficient version to this would be to have a highly conductive metal neck, attached to a thin copper pipe which carries water. Since copper and water have high levels of thermal conductivity, that would effectively absorb the heat accumulated at the metal neck of the bottle. Since the cooling power is proportional to the rate of heat loss, that would cool it down a bit quicker, I guess....