• 1
    Remove the lid of the beer can.

    You can sand the edge until you see two separate pieces, then you can pry the lid off. Alternately, use a side-cutting can opener.

  • 2
    Drill a 3/8" hole in the bottom.

    This is for the guitar jack. Note: you don't have to put it in the bottom if you don't want. Also note: a conical bit works wonders for this as opposed to an increasing series of drill bits.

  • 3
    Solder the piezo to the guitar jack.

    Use stranded wire about 2" longer than the height of the can.