Apparently, in 1968, the founder of Heineken's grandson, Alfred Heineken came up with an idea to make heineken bottles square so that they could be used to make buildings with.
He was visiting the caribbean and came across that famous green glass but he couldn't go fifteen feet without seeing it littered everywhere. He realized that the region did not have the infrastructure to re-use the bottles like other less impoverish areas so he came up with a solution: a brick that holds beer! Viola!:
It even has the little notches on the side to make it easy to hold together with mortar or what not.
Sadly, this bottle never got to the market and the closest thing to it that has been talked about more recently is this little heineken cube, but it is more for saving space than anything functional.
You can read the full article about this
here!
(images source is from that website)