These should be listed under industrial adhesives. I have never seen anything stick together so well as food and these pans. Bought them to replace a cheap set of Argos pans which were getting on a bit but wish Id never bothered. Only earn 1 star as they do look nicer than the usual black pans. Oh and the little saucepan is too small to register on some induction hobs which isn't mentioned until you unwrap the packaging. Overall the saucepans are fine for boiling etc but you will have to wrestle your dinner out the frying pans.