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Kourtney Kardashian and Travis Barker have been busy traveling around Australia with [at least] three kids while Barker’s band Blink-182 is on tour. Kardashian has shared controversial photos of her kids Reign, 9 and Penelope, 11 — who she shares with ex Scott Disick — enjoying life down under, and she and Barker have been seen spotted getting off planes with their infant Rocky Thirteen.

Kardashian recently shared a photo on her Instagram Story (see it HERE before it expires) of her hubby pushing baby Rocky in a stroller, and we’re not at all surprised by their choice. The stroller has a major cult following and is a perfect choice for traveling.

The KarBars have the Doona 2-in-1 Convertible Stroller and Car Seat, and it’s a beyond-brilliant piece of baby gear. As seen below, the Doona is a bucket car seat that has stroller legs and wheels that can unfold when you take your little one out of the car. Or, when it’s time to switch from walking to riding, simply fold the legs back up.

Kourtney Kardashian & Travis Barker Use This Stroller With Baby Rocky

Colors: Black, Gray, Red, Desert Green, Racing Green, Royal Blue

If this is the first time you’ve heard about this amazing piece of baby gear, we know what you’re thinking: Why hasn’t this always been a thing?

If you’re traveling or tight on space, it’s great to have one less item with you. And for families who frequently use public transportation (probably not the Kardashians, but ya know!), the Doona is easy to take on and off a train or bus.

People are understandably obsessed with this 2-in-1 combo. Shawn Johnson called the hybrid “life-saving” and Brittany Mahomes was spotted using one with her son Bronze on an island vacation last summer. Because, again, it’s a great travel system. Unlike a standard one that has a stroller frame that a car seat clicks into, this feat of engineering is just one piece.

It also has more than 14 thousand rave reviews on Amazon.

“WORTH EVERY PENNY! I have four kids total and this thing is a *life saver*… back saver, space saver, shoulder saver the list goes on! I am not a very big woman and drive a SUV and have no issues loading and unloading. To be able to just pop it out and and roll is BEYOND CONVENIENT! It is sooo easy to fold the wheels up to load and to pop them back out to use as a stroller! Not having to tote around a stroller to load / unload is amazing and saves all my truck space.”

“This is a life-changing product for newborns- the number of previous parents who have stopped us to complain that nothing like that existed for them is comical. It’s so easy to maneuver, the adjustable handle makes it easy and fun for siblings to push.”

“Let me clearly state that this has been the best and most satisfying purchase I’ve ever made in Amazon (and probably everywhere else).”