Merchant Boxes
Package design and brokerage. Come for designs, stay for integrated logistics that sources at lowest available price across the handful of serious producers and plethora of wholesalers.
The big producers are Westrock, Packaging Corporation of America, Georgia Pacific, and International Paper and none of them are really set up to service growing, indie product businesses.
I like the dynamics here a lot. It's a great gig for remote sales and design people that happens essentially all up front and the product continues to sell automatically and grow exponentially over a long period of time with little labor involvement. Margins are wonderful and the package prices are often a very small piece of the total cost to ship a complete product.
Integration with Shopify and Amazon APIs are cake these days. Keys here are awesome design, quality sales people, and pro logistics / ERP.
Beyond Shopify and Amazon integration, there are several potential partners here that could send this one into the stratosphere. A killer one is Stamps.com - they handle postage purchasing for 26 million packages a month.