I now have two of these tins, from M&S, in the shape of Xmas trees. They play an annoyingly tinny rendition of Jingle Bells when you rotate them. What am I meant to do with the tins when the biscuits have gone? They're too ugly for ornaments, even at Christmas, too awkwardly shaped for storage, and while they might amuse the kids for all of 5 minutes, there's a label on the bottom which says they shouldn't be used as toys.
After Christmas they will go into the recycling bin, along with thousands of others, but I suspect that a lot more energy will have been used to manufacture and recycle them than the equivalent for a cardboard box.
If M&S is serious about its flagship 'Plan A' environment policy then I think it should be collecting the tins in January for re-use in next year's Christmas tat-flog.