Abstract: A portable food container 2 for separately retaining first and second food items. The preferred portable food container 2 includes an outer container 10 including a first receptacle 12 at least partially defining a first compartment 13, an inner container 20 including a second receptacle 22 at least partially defining a second compartment 28, and an upper cover 50. The first receptacle 12 has an outer rim 16 and a first receptacle opening 18 defined by the outer rim 16. The second receptacle 22 has a peripheral collar 30 having an outer edge 34 and an inner edge 34, the outer edge 32 designed and constructed to engage the outer rim 16 of the first receptacle 22 such that the inner container 20 resides at least partially within the outer container 10. The inner edge 34 defines a second receptacle opening 36 and the peripheral collar 30 has an upper surface 38 interconnecting the outer edge 32 with the inner edge 34.

Abstract: A system for interlocking a plurality of modules, such as medical instrument modules (e.g., infusion pumps), in side-by-side relationship such that not more than one module can be mounted on each side of a center module. The modules are interchangeable in that any module of the system can be a center module or a side module. In the preferred embodiment, latching arms on a module are automatically moved as the module is mounted on a pole stand to allow other "side" modules to be mounted on that "center" module. The latching arms of the "side" modules prevent additional modules from being mounted on the side modules. Other embodiments are described as well.