If there is one object that defines an Australian Christmas, it is the humble Esky. These insulated containers are as essential to Christmas as the tree itself, perhaps more so. Families own multiple Eskies in various sizes, deployed strategically around the yard to ensure cold drinks are always within reach.

The largest Esky inevitably becomes the beer Esky, constantly monitored and restocked throughout the day. Smaller Eskies contain soft drinks for children, wine for the adults who do not drink beer, and water for those attempting to remain hydrated in the heat. Another Esky contains ice blocks for injuries, which are inevitable during backyard cricket.

Esky etiquette is complex.

Taking the last beer without announcing it is a social crime.

Putting a warm drink into the Esky is frowned upon as it melts the ice.

And everyone has opinions about the ice to drink ratio, with fierce debates about optimal packing strategies.

Some families have developed traditions around their Eskies.

One might be designated the "Santa Esky" and decorated accordingly.

Another might be the travel Esky that goes on the annual Christmas beach trip.

Eskies are passed down through generations, with some families treasuring decades old models that have seen countless Christmas celebrations.

The moment when the Esky runs out of ice is always a minor crisis.

Someone has to make an emergency trip to the service station or drive to a friend's place to get more ice, leaving the party temporarily.

The person who forgot to buy enough ice in advance is reminded of their failure repeatedly.

Sunburn on Christmas Day is a rite of passage for many Australians.

Despite knowing better, someone always forgets sunscreen or underestimates the UV index and spends Christmas night covered in aloe vera gel, unable to wear a shirt.

Family photos from beach Christmases often feature lobster red relatives trying to smile through the pain.

Whatever you're doing this Christmas, here's hoping you are doing it with fun, zest and fervour.

If you want to share your Christmas traditions, email me at [email protected] bonus points if you have a crazy Christmas story.