thermos_36

Even with the slack from the batteries, I still didn't want to screw it in too far, to avoid stressing the wires any more than necessary, and because I couldn't quite tell how much clearance I had between the batteries and the lump of solder and glue on the butt of the bulb. So the cap sticks out some. You can't see it very well in the side shot, so here's a better view.

Done