A trademark protects a mark that would cause confusion about the source of a product if it was used by another person/company. That is, it would protect any bra

A trademark protects a mark that would cause confusion about the source of a product if it was used by another person/company. That is, it would protect any branding on the package, rather than the design of the package itself. There is a certain degree of overlap with copyright, but: (1) for copyright to be infringed, the infringing item has to be a copy of the original; and (2) the subject of a design patent must have a certain degree of functionality and not be purely aesthetic (as copyright can be). A design patent can be infringed by a substantially similar design, rather than an exact copy. Design patents are very different to utility patents. In the examples here, it's purely the ornamental design applied to packaging that's being protected, not the functional aspects of the packaging itself.