Back in Laos, we had these plants that had a foam
inside them. If you take the foam and puts it in water,
it floats. Some of us have used that as bobbers. I have also
used just short dry sticks as bobbers.
Well, I grew up in a caveman lifestyle though. We used bamboo
torches to see at night and didn't have flashlights up on the
hills I grew up in. We certainly didn't have cans...lol