Why is that news? Because Procter & Gamble, maker of Folgers coffee, and Kraft, maker of Maxwell House, are suing one another for patent infringement link here and here. Each claims to have a patent on the can or some element of it.

Here is the actual patent: Patent #7,169,418 "A fresh packaging system for roast and ground coffee having a top load capacity of at least about 16 pounds (7.3 Kg) comprising a container with a closed bottom, an open top, and a body enclosing a perimeter between the bottom and the top. A protuberance is continuously disposed around the perimeter of the body proximate to the top and forms a ridge external to the body. A flexible closure is removeably attached and sealed to the protuberance so that the closure seals the interior volume of the container. The container bottom and container body are constructed from a material having a tensile modulus number ranging from at least about 35,000 to at least about 650,000 pounds per square inch (at least about 2,381 to at least about 44,230 atm)."

That isn't coffee you smell, its prior art.

Cans of nuts from Planters seal the same way. So do their no-name equivalents. I know I've seen cans of Planters peanuts with plastic snap-on lids going back decades. Prior art indeed.