Packaging Design Gradient Vodka Soda Packaging by John Eresman Gradient is a packaging design for a mixed pack of vodka soda drinks. The pack holds six sleek 355 millilitre cans with gradually reducing alcohol strengths of 8, 7, 6, 4, 3 and 2 percent by volume. The cans sit in a single line inside the box, and a dot matrix pattern fades from dark to light across the row. An angled perforation opens the box from the stronger end towards the lighter end, so the cans are taken in that order. The layout encourages moderation across an evening. Three flavours are offered: raspberry lemon, cucumber mint and lime.