what i used to do when really desperate is take a piece of tin foil (alluminum foil w.e u call it) and get a marker. Wrap the foil around the marker. Take marker out. Go about 1 inch down on either side and pinch it (This pinch should be tight so no weed goes down ur throat when inhaling). Then just use ur fingers to pull at the foil to creat a bowl at the end you pinched.

Just be careful with this because the foil does get hot after a lottt of hits.