- Joined
- Mar 17, 2010
- Messages
- 4,256
this was an impulse buy from campmor last year and i've used it a few times since then and it still works! the grabber brand disposable ones i used this past weekend's 2-nighter was completely useless since it turns out they have an expiration date. it had zero heat when i wanted to toss 'em in my sleeping bag near my feet (my thermarest inflatable sleeping pad completely lost air in the middle of the night with a low of 20[SUP]0[/SUP] f 
but that's for another thread).
the way it works is you bend the nickel-sized metal plate inside and within seconds crystals will form and the whole thing will turn into solid. you can see the metal plate near the bottom, center.
i'm sorry for the blurry pic but the hottest temp i observed was 126.5[SUP]0[/SUP] f (too hot for me to handle directly with bare hands for more than a few secs) and it gradually goes down to 100[SUP]0[/SUP] f within 15 min sitting on the desk at room temperature. definitely more than enough heat to trap inside clothing or whatnot...it's cheap, reusable and no expiration date :thumbup:
but that's for another thread).
the way it works is you bend the nickel-sized metal plate inside and within seconds crystals will form and the whole thing will turn into solid. you can see the metal plate near the bottom, center.
i'm sorry for the blurry pic but the hottest temp i observed was 126.5[SUP]0[/SUP] f (too hot for me to handle directly with bare hands for more than a few secs) and it gradually goes down to 100[SUP]0[/SUP] f within 15 min sitting on the desk at room temperature. definitely more than enough heat to trap inside clothing or whatnot...it's cheap, reusable and no expiration date :thumbup:
