5-gallon bucket partially filled with antifreeze, one or two board 'ramps' up to the rim, a half-inch diameter wood dowel on metal pins just below the rim to create a 'rolling' log with peanut butter smeared on the center of the roller. Mice go up the ramps, try to get to the peanut butter, fall off into the bucket and drown. Need to rebait my trap tomorrow and scoop out the latest round of deceased varmints.