Move over, Tupperware: Newell Rubbermaid's latest quarter is no artificial piece of plastic. S&P 500 +---% | Stock Advisor +---% Join The Motley ...

National rivals such as Newell Brands Inc. – which makes Rubbermaid, FoodSaver and Ball glass jars – and a “proliferation of private brand alternatives have chipped away at Tupperware’s ...