aka why on earth don't they come in packs of 7?!?!
Because I either have a yoghurt mountain that I have to chuck when they are two weeks out of date or a dearth of yoghurts and DS is bereft of any calcium intake. And so many different types - lunch box friendly, pudding type yoghurts, petit filous for the baby which I always seem to buy in packs of 180, my yoghurts for breakfast, occasionally a big pot of plain yoghurt.
This is actually the most pressing concern in my life right now.