I bought the Rubbermaid Cereal Containers ("18 cup Modular Cereal Container", "22 cup Modular Cereal Container" and "Flex & Seal Canister") for my mother who is over 85. This review relates to her ease of use. I also purchased a Tupperware Cereal Container for her, and the only thing that the Tupperware container had in its favor was a different selection of colors. In all other ways, all the Rubbermaid cereal containers are superior.
The rubbermaid spout closure is easy to open and close, and yet still seals tightly. The Tupperware spout closure kept coming off its hinge and was harder to open and close. The tops of all three styles of the Rubbermaids and the one style of Tupperware are easy to open and close; however, the Rubbermaid "Flex and Seal" with its tab on the top is clearly the easiest to open.