As you may know by now, Wal-Mart has started selling milk in a new type of container. This container causes problems when pouring the milk. I think that the problem could be solved by selling a reusable cap with a built in spout alongside the milk. The savings of the new container would eventually even out the cost of the cap, and both Wal-Mart and the vendor selling the cap could make money off of it.
I'd produce this myself, but I have no idea how to get started. I tried contacting the company that designed the new containers but they aren't easy to get in touch with. I thought it best to put the idea out here instead.