$150 can buy a hell of a lot of chemical glove-warmers
https://www.walmart.com/ip/Hot-Hands...-10pk/17808715
Also, you can buy reusable warmers that are filled with a special solution so that you can boil the pouch to cause a chemical reaction that stores potential heat energy, and then "click" an activator inside the pack and that starts a reaction that slowly releases heat back out.
There seem to be many companies that make these, all with "click" in their name:
https://www.google.com/search?q=reus...ing+pack+click