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Has this ever happened to you? You're sitting in a noisy room with plastic water bottles, hot glue guns, and soldering irons EVERYWHERE and you can't hear your music? Fear not! You can use those conveniently placed DIY tools to make your very own really, really ghetto all-acoustic amplifier! Yes, you too can enjoy not just increased amplitude for your portable music player's wimpy headphones but also all the class of holding a plastic bottle to your ear in a public location! This really puts a new meaning to the term ghetto blaster.
Step 1The Bottle's Labotomy
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First, cut off the top of a plastic water bottle. I have no image of me doing this but think you can figure it out on your own. Then use a hot glue gun to put an old headphone you're not particularly fond of in the opening at the top. Make sure there aren't any gaps so no sound waves escape out the back. Also, be very careful not to cover the little holes in the back of the headphone with glue. If you do, it will actually decrease the volume. People who are not aware of the volume buttons on their MP3 players may want to consider this as an option.
P.S. - I am aware of possibility for a pun in the title. If you are too, please smack yourself as I am not capable of doing so.
(P.S. no offense)