Orphan Barrel Muckety Muck 26 Year Old Single Grain Scotch Whisky - Although Port Dundas Distillery closed its doors in 2010, there are select, rare remaining stocks that allow a glimpse into the glorious past of one of Scotland’s most respected and historic distilleries. Muckety-Muck is one of those rare single grain Scotches, now releasing the 26-year old following the smashing success of the 24 yr and 25 yr release.