Balvenie Teaspooned with Glenfiddich. Burnside is what's known as a 'teaspooned' malt, which means that a tiny amount of whisky from A SISTER distillery is mixed with whisky from one distillery, so it can't be sold as a single malt under any distillery's name. Balvenie and Glenfiddich are both Speyside Whiskies, owned by William Grant.
This Speyside blended malt scotch whisky is rare, with only 211 bottles worldwide. Balvenie teaspooned with Glenfiddich. There was no colour added and no chill filtration. It was distilled in November 1988 and bottled by Blackadder in June 2018.