The fact is that physical goods bear various kinds of intellectual property. One example is medication. For example, medication can come in across our borders or be sold in our stores in pill form without any packaging. If you look just at the medication, it's probably protected by patent laws. There are patents on that medication. You would probably have to know something about the medication itself to tell if it's infringing the patent.
The packaging itself may have logos, names and designs on the packaging. Very often when customs sees product coming into the country, they know by the packaging before they ever get to the product whether there is a problem with it and whether it's potentially counterfeit or pirated. What we've seen with things like pharmaceutical packaging and packaging of toys, packaging of shampoos, packaging of the things I have mentioned, is that the counterfeiter, the pirate, may copy the actual work, the copyrighted work, on the outside of that package and take off the trademark name, not realizing that it's protected by copyright as well. There is the example. Even something as simple as automotive parts can have logos and designs on them that are actually protected by copyright.
I hope that responds to your question.