Called Delta, the shower consists of a bent tubular frame and shower head, which can be attached to a standard garden hose.
Here's a little more information from Tectona:
Delta outdoor shower
During development of the DELTA model for Tectona in 2009, Inga Sempé aimed, in her own words, "to design a shower that can integrate into any type of landscape, and which is sufficiently light visually speaking so as not to break up the view". To ensure its stability, the shower must be fixed to a hard solid surface using the provided kit. It connects to a standard watering hose.
Tom de Vrieze
|Inga Sempé for|
|Grasshopper by Wieki Somers|