The icepacks will thaw during shipping as they absorb heat instead of the chocolates abosorbing the heat.
In very hot weather., they will thaw faster but generally they will stay cool long enough to absorb the heat first so that the chocolates do not absorb heat and melt.
We also use Thermal boxes to assist the contents to stay cool and extend the freeze time of the icepacks.
So far this has been the best method of transporting our beautiful chocolates around Australia with a minimal amount of products melting.
The icepack may arrive thawed in hot weather but as long as the chocolates are not melted, the icepack did its job.