Each night just as I say my last goodnight to Luke he says:

OK, I have a few small things to ask. 
One, please leave the door open just a crack (to which he makes a visual indication with his hands). Two, please leave a glass of milk in the fridge (which he never drinks) and for the last few nights he has also asked to have a small glass at his bedside to put his loose tooth in case it falls out in the night.

Tonight, there was a small change,

One and two were the same, but three was

“And a small bowl in case I want to throw up”

Very well, Luke, a small bowl it is.