Bundling is the process combining products to sell them on Amazon in a different format than how you are buying them. Bundles can either be i. selling multiples of a product under one listing (aka: Multi-Packs or 2-packs, 3-packs, etc.) or ii. a combination of different products under a listing (ex. bundles of different complementary products like a toothbrush and toothpaste sold as one item on Amazon). 

Usually, bundles are created by shrink wrapping, poly bagging, or even rubber banding your products together.  

Amazon will not "bundle" products for you. 

To have your products bundled, you have 2 options; 

  1. Ask your supplier to do the bundling for you, or 
  2. Have the products shipped to you or a 3rd party logistics center to bundle the products.

Bundling example; 

You might be buying a 6 pack of products that you want to sell on Amazon as 3 packs. Now, if you wanted to sell these products as a six pack or as individuals, you could send them to Amazon with no problems. 

But, since you want to split the 6 pack into two 3 packs, you will need to have the 6-packs broken down and then have 3 packs created (usually poly bags are easiest). Then the 3 packs all need to be boxed (and possibly pelleted) for shipping to Amazon.