Abstract: Apparatus and associated methods relate to a bi-directional conduit system including a core configured to traverse a container wall and having independent, substantially parallel lumens and a fitting fluidly connected to each lumen on each side of the wall. In an illustrative example, the conduit system may include at least one valve configured to selectively restrict fluid flow in at least one lumen. The core may be flexible. A coupling assembly may be configured to releasably couple the core to the wall. Apparatus and methods further relate to a system including a base module with a control input and a fluid transport system including an impeller powered by the base module to convey fluid via a conduit in response to the control input, wherein in a stowage mode, the base module is configured to store the conduit and to mechanically support, releasably coupled, the impeller to the base module.

Abstract: Various apparatuses and methods relate to coolers or other containers having attachment features to which modular accessories may be attached. Various apparatuses and methods relate to wheel and modular accessory attachment systems for attaching to a cooler or other container. Various apparatuses and methods relate to rails and channels for sliding attachment couplers. Various apparatuses and methods relate to keyed male-female attachment couplers. Various apparatuses and methods relate to a chassis configured to adjust in size for adapting the chassis to fit a variety of container sizes. Various apparatuses and methods relate to a coupler assembly for mechanically securing a container to a container undercarriage system.