A few brands of chocolate milk mix come in re-sealable tins like this:
It is also possible (and slightly cheaper) to buy 'refill packs', in order to reuse the tin. However, these refill packs are made of a soft plastic packaging:
I have read that it is easier/more efficient to recycle tins vs soft plastics, and that the recycling rates are also higher for the former. Does this mean - purely from a sustainability standpoint - I should buy new tins over refill packs?
How do the lifecycles of both tins and refill packs compare?