The question on everyone's lips is: "Is it safe to reuse a water bottle?"
Fear not, the BBC has come to our rescue with this handy little video.
Please spend a few moments of your time watching this, and feel free to take notes - copious notes - notes you can access at a moments notice. You could die a long and painful death if the temperature goes above 20.1ºC and you are not clued up.
Next week: "After whipping cream using a whizzer stick can I lick the blades clean with it still plugged in?"