So I was pouring todays tea into a 1.8L bottle of mine when I realized something.
1: You don’t see many 2L bottles. You would expect more 2lt bottles (5 volume and liquid storage) of varying sizes. While not all would be full, surely some would be 2L bottle (2) or 2L bottle (3), right?
2: I don’t see much tea or coffee. Why not coffee makers and tea kettles with coffee/tea left in them, and tea left in the refrigerators in various containers?
3: Why not an electric tea kettle? I have one. It would take batteries, carry 5 units of water, and would be capable of boiling it all at once without having to pour bottles of water into a pot, boil it, and pour it into another bottle. Also if you have enough tea leaves it would ask if you’d like to make tea instead of clean water. The only problem I see with this is the possible difficulty of making “a” both clean water/make tea if there’s unclean water in it, and to drink if there’s clean water/tea in it. Although I suppose you could "U"nload it into a 2lt bottle and have it undrinkable from the kettle itself.