Glass, its the least conductive of the choices provided.
EDIT: That said glass is still quite conductive.
I would like to see it all on a scale of some sort![]()
Its not about conductivity its about insulation , you wont notice any remarkable difference between any of those containers.
LOL, if an item has bad thermal conductivity it is a good insulator.
^ this ^You can get the ice buckets with the foam insulation in the middle and they have a lid. This would be your best option, they are basically like little cooler boxes.