Leading a sustainable life is a noble aspiration, but a tricky one to have if you’re living in a small apartment. Take compost, for example. Aside from being a messy process, it requires space we don’t always have. Luckily, designers do think about these things and come up with ideas. Here is one from London based design student Fanny M.E. Nilsson – a portable waste processor that turns your food leftovers into a liquid fertilizer. The piece, aptly called Re-Feed, is no bigger than a toaster. The idea is to throw the leftover food into the machine, close the lid, push a button and walk away. No fiddling with soil, no sacrificing units of space for bulky containers. “Inspired by lacking food waste recycling infrastructures in flats and high-rise housing in central London, the Re-Feed provides a simple alternative to sending waste to landfill or composting.,” – says Nilsson. When the fertilizer is ready – it can be fed to a plant through the convenient nuzzle. Re-Feed is fitted with the rechargeable battery,  so it can be easily moved to any room. The piece is only a concept at this point. Can’t wait to see it produced.