I use a very expensive piece of equipment called a 'plastic bottle and plastic tube'. You can pick the tube up at any hardware store, but the bottle requires you to consume whatever liquid is being stored in it when you buy it. After draining the bottle, drill a hole in the lid, put the hose through and the other end on the bleed nipple, put some water in the bottom, squeeze the bottle and put the lid back on so that it creates a bit of a vacuum to suck the fluid through the hose.

I am planning on getting a fancy check valve brake bleeder one day, but until then, this method works fine.