Solar can heater

Has anyone thought about building a beer can heater for their ice house to keep it warmer when they are away? I was wondering if it would be worth the weight vs the heat and how well it would keep the house warm.
http://www.instructables.com/id/How-to-Build-a-Soda-Can-Heater/
I can just hear my wife now “wow you have been drinking a lot of beer this week!” I know, I need to build this heater

I have one on the side of a spear house and works great no cans on the inside and I used heavy plastic for the front

That sounds like that design would not weight as much. But it would also not be as much fun to build.

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Instead of the cans you can use the black corrugated 4 inch drain tile cut in half and a 12 volt car heater blower with a thermostat on the inside of the panel so it does not over heat.