If you’ve ever volunteered to help pick up litter, you may have noticed that beer bottles are second only to cigarette butts in their abundance. But all that glass has the potential to be more than trash.

In China, a farmer took 66 bottles of beer and set them up on his roof as a solar water heater. And Heineken once producedsquare beer bottles that could have a second use as bricks for housing. Now that’s thinking out of the bottle!