Update/Disclaimer: I have been getting a lot of views of this post, probably since folks think they might actually get instructions on how to make the very bright and pretty mason jars seen in the image going around the 'net. I never could get the original link to work, and I'm fairly certain that those jars were manufactured, not a D.I.Y. project. Correct me if I'm wrong, and enjoy our project!
A friend had pinned an image with a caption that claimed a how-to for making jars look like "sea glass" using Elmer's Glue and food coloring. As luck would have it, the link didn't work - the server (or whatever fancy website-blocking software) here at school blocked it. I should probably be thankful, since it very well could be a bogus, porn/virus-filled link, despite the really pretty jars. But if you've seen this pin, and the link works, let me know. Maybe it's legit (or possibly even too legit to quit).
LEFT: the alleged "sea glass" jars RIGHT: the "sea glass" jars we made
circulating the world of Pinterest after reading several how-to's