I love things that have more than one use, multi tools are great because they can lighten your pack. The light stick is amazing with 200hrs of light. You need to show people how to get the whistle though, small children might not notice it right away.
These are great addition to your travel or car kit. Batteries may get old but these are always good.
Better than reflectors
Great for stocking-up for each member of the family. I have reflectors in my car in case I have to change a tire at night. These are much better and you can tie them to your coat or wrist.