This is a garden gun. What a brilliant example of an innovative design that makes gardening more fun by the simple appliance of a gun shape on a water hose. It's perfect for a game of water fighting with the kids as well!
The + Garden Gun 5.1 design was part of a project called The Design Reaktor Berlin.
The project is a multi-disciplinary research project at the Universität der Künste Berlin (Berlin University of the Arts). They want to encourage collaborations and match innovative designers' skills with small and medium-sized companies to find new solutions to industrial design and locations in Berlin.