Hypothermia is always a real consideration for my survival kits, even in the summer, and especially around the water. I like to have a tasty hot brew up at the ready in all my kits.

Bullion cubes or cup-o-soup are lightweight and take up little space, ditto tea, instant coffee/hot chocolate/cider/Koolaid. I suspect my hot chocolate or 3-in-1 coffee provide me with more benefit than a bullion cube, so they are my basic short-term emergency go tos these days, rather than bullion, except in my fishing kit emerg kit. I've got one of each in there! Bullion goes great with fresh fish and I can't imagine a better survival meal than that, frankly!

(FYI - I keep a sachet of koolaid in my kits too, for fighting hypothermia in the kiddos, and also for cool re-hydration.)