When strolling the aisles of a supermarket, consumers constantly evaluate products, often according to their packaging. People judge obvious things like uniform fill levels, straight labels, firmly closed caps, and so on. Many of these are cosmetic, but there is one evaluation point far more important: Is the package leaking? This is not always an easy thing to determine, which makes it even more critical since buyers may not realize what has happened until they get the product home, only to find it spoiled.