The latest development of the £10m campaign behind Grolsch this year is poster advertising. The campaign will run on 1,300 sites including 48-sheet, six-sheet and bus sides in July. These will be in major cities including London, Birmingham and Sheffield. The Wave 3D-effect poster shows that despite imminent arrival of a tidal wave, the Swing Top will only move when it's ready, not before. {{DRINKS }}

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