KGB is one of the ready-to-drink brands that came out of Independent Liquor, the New Zealand drinks company Michael Erceg built up from the Calypso Beverage Company he formed in 1987. By 2005 it held about 65% of the country's RTD market and exported to 70 countries. Independent was sold to Asahi in 2011, and in 2019 the New Zealand business was renamed Asahi Beverages (NZ).
This is KGB Lemon, also sold as Lemon Ice. It is vodka with lemon, lightly carbonated, at 7% alcohol, in 250ml cans, and it comes as a pack of twelve. The cans are small, each one a single glass rather than a long pour.
Lemon is the only flavour here, so the cleanest way to drink it is cold from the fridge, sipped from the can itself or tipped into a tumbler of ice with a lemon slice. The sharpness stands up to salty food. A bowl of hot chips or a plate of fried calamari makes a better match than anything sweet.