When I was on student exchange in China, I was very fascinated with these milk-in-a-plastic-bag. Besides regular milk, other types of liquid also come in these bags, eg: watery yogurt or peanut milk.
From where I grew up, liquid milk either came in a bottle or a paper box.
I like milk in a bag. It’s more convenient to pack since it won’t have the pointy edges of paper-boxed milk or the awkward shape and weight of a plastic bottle.
But I don’t like how awkward it is to drink. I either have to cut a hole and drink it like I’m sucking on an udder or find a glass to pour it in. There’s also a risk of the bags leaking because of sharp and pointy things in my bag.
If you’re ever in China, give these milk-in-a-bag a try. They taste good.