Sherlock glances up at John, feeling legitimately surprised that his purchase is going over so well. When he'd brought it up the first time, it had led to a rather unpleasant argument that ended with Mrs. Hudson asking them if anything was wrong and him going to sulk in his room until the whole thing blew over. That had been before their mutual agreement last night, however. It seems to him that things are finally starting to settle and he couldn't be more pleased with it.

When John leaves to fetch his laptop, Sherlock collects his specimen back into storage and goes to make himself a tea with the water John had put on. He hasn't had breakfast and since it would be several hours before getting back to work, it seems to be a good time to eat something. When John comes back down, he'll find Sherlock standing in front of the fridge with the door wide open while he takes his time deciding what he wants.