It's not as cold or as convenient as a standard plug-in refrigerator. If you're living in an area with access to HN, congratulations, you have electricity, whic

It's not as cold or as convenient as a standard plug-in refrigerator. If you're living in an area with access to HN, congratulations, you have electricity, which eliminates the need for something like this in your area unless you're really trying to save on energy. Another contributing effect is probably that not everybody understands the concept of this design. Much of the world is under-educated, with limited access to knowledge like this.