All the supplies you need to run a Design Sprint
You will want (ideally) two whiteboards. This particular model is pricey but high quality—it doesn't shake too much when you write on it, which is a big deal. If you can't get whiteboards, consider:
Black Whiteboard Markers
You'll use these on the whiteboards and for exercises on paper. Using a thicker marker will keep your ideas pithy and easy for others to read. Chisel tip is best. Get 12 markers.
Eat healthy snacks during your sprint. Apples, bananas, yogurt, nuts, and dark chocolate. Get more than enough for everybody. Sugary foods and big burritos will make everyone sluggish by afternoon, so opt for healthy.