Product Bundles for Virtuemart is a useful plugin for buying multiple items at a discounted price. You can motivate people to buy more products with customizable discounts. The product page displays the main product and a set of additional products using an additional field. Features. Ability to set a discount when adding multiple products to the cart, Virtuemart 3 support, support for other custom fields, integration with the popular Stockable Custom Fields plugin, design management and much more.