The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people

The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people. I get the point you're trying to make that this seems to suggest that drinking Diet Coke is something also not "delegated to the United States by the Constitution" but I think people who disagree consider that drinking Diet Coke is not a "power" in the same way that operating the FBI is.