Rock Island 21-Year-Old is a blended malt Scotch whisky bottled by Douglas Laing in 2019 as part of the Remarkable Regional Malts series. Aged 21 years, it was released at 46.8% ABV in a 700ml format with just 4,200 bottles produced.
The citrus is rather pleasant too. The palate is a little less impressive with a slight sour and rubber-y note. More peaty than you'd expect at this age as well.