Milk comes in 1.13 litre (= 2 pints – these Brits really resent metric measurements; they seem to think it’s the EU imposing their bureaucratic ways on them) or 1/2 litre(ish) square plastic jugs. I only use milk in my tea (or an occasional mac & cheese recipe), so I usually buy the little ones.
I don’t like loose open containers of dried food in my cupboards – I think they’re messy and they spill easily. So when I open a packet of rice, or lentils or beans, I pour the remainder into these washed-clean little jugs. They’re also great for making dressings, etc…
LL was so impressed with them, she took a half a dozen home with her for her new RV (they went into the part of the suitcase that had housed all the ramen on the way over here, I suppose).
But, while I like their convenience, and I do re-purpose them and re-cycle those I don’t need, I’m not crazy about using plastic. I noticed this Milk Refill Station in the local grocer & general store. Well, this is genius! You buy the bottle, and then re-use and refill. And, it’s buying local.