Uniheat Shipping Warmer 40+ Hours, 12 Pack + Free Bonus!! Buy a 40 Hour 12 Pack & get One 20 Hour for Free! 40+ Hour Warmth for Shipping Live Corals, Small Pets, Fish, Insects, Reptiles, Etc.

I've gotten a few rotten eggs in big bunches like this. Remember, they're air activated so the tiniest pin hole in the bag will let air in then they will be used up by the time you use them. They are still the best though and don't overheat my coral during shipping.

Few that didn’t work.

This product is a joke. Lost hundreds of dollars in house plants because they did not work!