A difficult one to do, but it will save you hours on washing up.
Turn the tap on, make sure it’s at your favourite temperature (i burned my face on the first few goes, but we all learn by practice!).
put your mouth directly underneath the flow of water. Aim is essential here, or you might get a wet face – and that is yucky!
fill your mouth up with water and then swallow it.
repeat until quenched.
and now you can use your redundant glass for bee-keeping or for your special university pencils and rulers.