Methods and systems for generating a product packaging model for a product offering of a set of product items associated with a merchant account. At an e-commerce platform, a trigger event is detected and, in response, two or more product items are automatically selected to form a kit that makes up the product offering. Model data for the two or more product items and packaging parameters are used to automatically select a packaging option and to build a product packaging model that is sent to the merchant account. The product packaging model may be a three-dimensional computer model of the kit containing the two or more product items.