The nearest supermarket is called Eroski and is about 1.5 km from the house. There you get from drinks to food once the most necessary for his stay.
A little further away, a good 2.7 km from the house, is a Mercadona market. If you get everything your heart desires from fresh meat over fresh fish for a delicious barbecue to household goods leaves the market almost no wish. The website of the Spanish chain is even German and English speaking and the supermarket chain is currently working on a delivery service like the German company REWE.