Origaudio Universal Rock-it 3.0 Portable Vibration Speaker with Rechargeable Battery 3.5mm - White
I first saw this product on Shark Tank and was immediately interested.  One night I was playing beer pong with some friends and we didn't have speakers, so I thought it would be great to have this so we could turn a cup or trash can into a speaker.  I ordered it the next day with high hopes.  Once I got it I did what anyone else would do and started testing objects to see what things this sounds good on.  After the initial WOW factor of seeing how this thing turns almost anything into a speaker I realized s