When paired with an insulated box, these temperature maintaining gel packs will keep a consistent temperature of 72 degrees inside of the box for 48 hours. This is within controlled temperatures between 59°F and 86°F. Even with extreme temperatures outside of that range, the temperature inside the box will change very slowly.
Ant Gear provides free insulated boxes for shipping live ants.
For more information about this product, check out the Cyropak website.