Each of my PSK's has a piece of retro-reflective film that is sized to just fit inside the lid. Each piece has a hole (paper hole punched) in it to tie it off by. Figured that these could be clipped on a belt loop or jacket when working around vehicles at night and would also be nice to tie onto a pole that could be placed by where you are bedded down or hurt in the boonies. Wind blows them around, they stand out in the day or night nicely.

I was as at trade show and managed to acquire several nice sized pieces which have since been placed in the various family members kits. The film that I have is basically the same as used on big trucks etc. Mine are red and white colored (one color per kit).

The streamers will also work well in the day. Regarding placing the retro reflective film on the streamer, it might be advantageous to place some in an alternating pattern on both sides of the streamer. Better chance of being seen.

Like George said, it takes little room and reflects nicely.