Interior designer Alfons Tost has designed this unique eco-friendly interior for the Fastvinic cafe in Barcelona.

The Fastvinic cafe has an over-arching warehouse-style look, with its tall wooden and metal shelves that are lined with potted plants -- which help the "regeneration of the oxygen," says the designer -- and its hanging lamps, storage boxes and overall simplistic aesthetic. At the front of the cafe, a large glass window separates diners from the kitchen, allowing patrons to see their sandwiches being made. The cafe also has a lower level that houses the bathrooms, which feature charming basket-like sinks.

Tost's goal was to infuse the entire space with sustainable elements; indeed, he says that the entire cafe was designed with elements that could be recycled and dismantled. Every part of the Fastvinic cafe is eco-friendly, from the lights, which operate on LEDs, to its food containers, which are 100 percent compostable.