Shop for the Stabilo Swing Cool Pastel Highlighters Pack of 6 at Ace Promotions. These highlighters have a flat shape, making them easy to hold and use. They have a water-based ink and come in six pastel colours, making them perfect for use at school, university, or at home. Order now for free delivery on orders over £40.Shop for the Stabilo Swing Cool Pastel Highlighters Pack of 6 at Ace Promotions. These highlighters have a flat shape, making them easy to hold and use. They have a water-based ink and come in six pastel colours, making them perfect for use at school, university, or at home. Order now for free delivery on orders over £40.