Design Elements: Planter seat

As a boater and a tiny home enthusiast I appreciate anything that successfully serves multiple purposes such as this simple but effective planter bench seat (though the seat itself could be a little deeper). Relatively easy to construct with salvaged wood or inexpensive wood from your local lumber yard. One could even imagine storage under a deeper bench for tools and supplies used to maintain the integrated garden flora (ideally native species that require minimum energy and inputs). Google "planter seats" images and you'll see a variety of interesting designs.

While thinking about fertilizer for the planter flora it struck me that one could design an outhouse where human excrement is composted and then directly used as fertilizer in the integrated planter (containing non-edible plants to be safe). A multifunctional closed system containing an integrated outhouse (with rain catchment), composting system, and planter (with a few pungent plants) where use of the outhouse helps adjoining flora thrive.