January 22, 2014 7:06 PM Subscribe
I'd like to ship glass containers carrying liquids to a friend in a Northern state (opening them up and placing them in another container is not an option, as they are carbonated.) It is currently winter and frequently well below freezing outside. Is this possible to do without the contents freezing solid and exploding? FedEx recommends placing thawed gel coolants in a package to prevent freezing as a "heat sink". How does this even work?