Product bundles are a great way to increase average order size, deliver a value proposition and even creatively sweeten the deal when MAP (minimum advertised price) regulations apply to a product (offering free or discounted bundled items).
Walmart is promoting value bundles this year on everything from computers to toys. Here's a recent email:
And here's a close-up of one of the bundles' product pages:
"Get more, save more and spend less when you buy these items together." Brilliant. Customers can even choose their options right on the product page and the total updates itself at the bottom.