Sure thing---this was too adorable to leave alone. If only she really did something like that in-game when this happens, though... In reality (reality?) all we get is having to go to bed early and no boost to Courage at all.
I think it was a bottle, one Souji thought was full of tea. This is from an actual scene in the game, as every night you can check the fridge. One event is the above, though the conversation with Nanako is made up.
Well then, Nanako will go and buy a whole bunch next time!!Big bro, that...Oh, do you like noodle broth?*pah*Noodle brothIt wasn't barley tea, it was noodle broth...Na, Nanako-chan, no, you see, this would be...For some reason, speaking politely.