You can do even better than recycling. Upcycle your empty plastic water bottle into a smart kitchen tool to help with ...

The egg whites are the secret to success here ... but you can use an empty water bottle trick to get the job done easily. What matters is you get nothing but whites in the bowl of your mixer ...

Watch this fascinating demonstration of air pressure at work. Notice how the egg vibrates as the heated air escapes around it, and how it gets smoothly pushed into the bottle by atmospheric pressure.