Johnnie Walker Black - Air-Ink - WarsawBlended Whisky Scotland 700ml ABV: 40% Keep Walking Collection Air Ink Warsaw The Keep Walking City collection was made in partnership with Air Ink, a brand that creates ink by condensing carbon based gaseous effluents generated by air pollution. Six cities are represented by individual bottles in the range, and only 2,500 bottles per city will be available to purchase between July to September this year. The cities comprise: Mexico City, New Delhi,