I wish there were weigh and saves around every corner again.....I have student nostalgia.
Nothing like a bit of spittle in your cornflakes and belly button fluff in your soup mix beans.
I have fond recollections of making sure the chocolate cereal hoops were not really dog mixer, and also copying down the instructions for various pre mixed ingredients, from the lids of the tubs. You had to be really diligent about decanting into labelled jars, otherwise you were never really sure if the stripey bag full of lumpy dust was a pizza dough mix, short crust pastry or sponge cake!
I am sure there lurked five year old crumbs and silverfish at the bottom of those barrels, but we didn't care, it was sooo cheap and where else could you get kilo bags of broken biscuits alongside 100g of fairy washing powder (just enough for one wash)