I think those green phones are a one of one. Made by a handy-man in a garage. I may have a strange view of ugly but all my posts were ugly to me. I do not know if these are even functioning headphones. There may be a breach of rules as they may not be named or by a major manufacture. Who ever made them for the school project has moved on to work for Skull Candy.
If you aim well enough, one should do for both of your ears. I would go for my eyes first, though, because those are the ones suffering even when the 'phones are off. Another attempt to make a "hip" pair of headphones. How many of those do you think sold?