This Chuck Close-style self-portrait by Mary Ellen Croteau is entirely made of discarded bottle caps. (A lot of them are from sodas, but deodorant caps, childproof pill container lids, soap bottle-style pumps, and tops from bottles of saline solution and eyedrops are also represented, along with probably many more.) This is possibly not a practical recycling solution for everyone, but you gotta admit it looks amazing.
Here's the eye in progress:
And here's a close look at some of the myriad bottles that form the nose:
