Water

You have to drink water. And you should probably not risk drinking it from the tap. So, you buy bottled water. And over the course of time, that amounts to a lot of plastic bottles. On average, I would guess I drink about two 1.5L bottles per day. Over six months time, that's a lot of bottles for one person. I kind of feel bad about that.

It usually costs 5,000 dong or 30 cents for one large bottle. Not too much to spend for safe water. 60 cents a day allocated to its consumption. It was recently brought to my attention that I could get a huge 21L jug of water delivered to my hotel. And it costs the same as two of the large bottles, delivery included! 21L for the price of 3. Ridiculous.