Eric Ries is the author of the blog 
Is your product an Ice Cream Glove or a Snuggie?
At each of the lean startup master classes, we've turned to a special expert on entrepreneurship to provide us with special insight; Ali G teaches us
about two enduring kinds of failed products: the Ice Cream Glove and the
Hoverboard. If you look at the typical startup, you will see the vast majority of their energy and time invested in building new technology. We act as if the biggest risk to startup success is that the technology won't work. But in reality, most products fail because they are the Ice Cream Glove, that is, because there are no customers who will buy them.
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