Kristin Cavallari's Must Haves: From a Luxe Espresso Machine to Rao's Marinara Sauce

Another travel must have she adores is her Street Level The OG Reversible Tote ($60). "You can literally throw everything in there, and it'll fit," she says — plus it's lightweight, and it has comfy straps so no matter how jam-packed it is, it won't dig into your shoulders. Cavallari can fit everything from her laptop to a ton of snacks and even a to-go meal in this huge tote bag. She also carries a little beauty bag with all her essentials, big headphones, a book, and a water bottle. "It really will hold everything that you need for a flight," she says.

Pro Tip: This reversible model is perfect for work and travel, plus it comes with a detachable coin purse.