This is clearly the design of Windsor Supreme Canadian Whisky, but it says "Winston", which isn't a real brand. Why so? Well, it might be an homage to the cover of Iron Man issue #138 – the classic "Demon In A Bottle" story line – in which Tony battles alcohol addiction. The cover illustration also apes the Windsor design, but substitutes Winston on the label. Lovely touch, Netflix/Marvel. Many thanks to Rob London in the comments for that one.