He'd likely have a black one of these stashed wherever, or something similar. Multi-Purpose 1 day pack ( FirstSpear is a brand created by former U.S. servicemen, they develop enhanced light-weight load carriage solutions for the US Special Forces )
For camping or late nights at the beach? Leave 1/4 of Mountain dew in bottle (just dont drink it all), add a tiny bit of baking soda and 3 caps of peroxide. Put the lid on and shake - walla! Homemade glow stick (bottle) solution. So cool!
Solar charging backpack that can charge your laptop. From Voltaic. This can be your bug out bag. Charge your phone and flashlights and laptop. Just fill it up with supplies. Grab and run in any emergency.