is here portrayed referring now to fig2 a study of a cross sectional view of the first embodiment 10 reveals dewar flask 11 with a stopper 33 and septum 13 resting in screwing engagement with the utensil bin by joining a tube member 17 in screwing engagement to a base 31 with these basic building blocks the modular design of the invention is revealed modular design or u201c modularity in design u201d is an approach that subdivides a system into smaller parts modules that can be independently created and then used in different systems to drive multiple functionalities a modular system includes functional partitioning into discrete scalable reusable modules consisting of isolated self contained functional elements with rigorous use of well defined modular interfaces besides reduction in cost due to lesser customization and less learning time and flexibility in design modularity offers other benefits such as augmentation adding new solution by merely plugging in a new module and exclusion modular design seeks to combine the advantages of standardization high volume normally equals low manufacturing costs with those of customization a modular insulated container system in accordance with the principles of the invention then is generally indicated at reference numeral 10 in explanation of the modular nature of the invention the key concept to grasp is that in each configuring any of the embodiments there is one instance of joining one element to another referring to fig3 4 and 5 one of the strengths of the modular design of all of the embodiments is demonstrated to be in the flexibility the design enables a stopper 33 and the dewar flask 11 cooperate to define a first receptacle 42 which has a first receptacle open end 44 and a first receptacle opposed end 46 defining a first volume 48.