A guy called Dean Brown from the UK has created this Audio Can using a baked bean can. The Audio Can houses a small loudspeaker,amplifier and audio input. It can be used as a single speaker or can be ‘daisy chained’ together to create a surround sound system.
The Audio Can uses 3.5mm audio connector so you can use it with media devices with a 3.5mm jack. A 9V battery is included. The Can is available on ebay for GBP 27.5.