And among the nappies, lip balm, undies and snacks are also a few touching family tokens.
While the 36-year-old mother-of-two is now no stranger to the birthing suite, according to OK! Magazine she will be taking "a 19th century alabaster cameo pendant the Queen gave her," and her mother's black onyx beads that she squeezes, both for good luck.
Also as lucky charms, her two children Prince George, 4, and Princess Charlotte, 2, pack their favourite toys into her bag.
She'll reportedly be bringing a few treasured photo frames to the hospital with pictures of the Queen, her parents and siblings - Pippa and James Middleton, reportedly stashed away too.
And, when it comes to her pick of self-care products, it would seem Kate is a fan of natural therapies.
LISTEN: We take a look at the final month of pregnancy, including what to pack in your hospital bag. Post continues after audio.
Inside her hospital bag will be Madagascan vanilla aromatherapy kits and candles that were gifted to her by Will to create ambience, as well as her favourite moisturisers.
While we weren't given specific names, we know that the royal is a fan of oils like Bio Oil ($14.99) and Trilogy's Rose Hip Oil ($35) - which has a host of benefits. And according to Allure, she loves Beuti Skincare's Beauty Sleep Elixir ($75) too.
And the Duchess' entertainment picks? Well apparently she's a Kindle user and has it "loaded with the latest Booker prize winners," like 2017's Lincoln in the Bardo by George Saunders and 2016's winner The Sellout by Paul Beatty. When it comes to films, she reportedly goes for the classics: Bette Davis movies.
Now all that's left to do is bring this baby into the world!
What do you think of Kate's hospital bag essentials and what are you hospital bag recommendations? Tell us in the comments below.