We often seem to camp on sites without access to freezer to refreeze icepacks, and prefer not to shop whilst away just for a weekend. having just thrown away some dodgy smelling meat from our coldbox, it's time to invest. I know people lust after icey tek ones, but DH has pointed out that if they are so good at insulating, the walls must be thick, so for a box the same size as our current one, we will fit less food inside. Is this true or is there such a thing as a tardis coolbox?