2. Kylie Jenner: Lip Kits
Whether you consider yourself more of a gloss girl or a liquid lipstick lover, chances are — if you're a fan of Kylie — you own at least one of her many Lip Kit creations. And you're not the only one: These coveted lip kits, particularly the limited edition sets, regularly sell out and has even inspired a pop-up shop that promises cosmetics and Kylie-themed merchandise galore.
3. Kim Kardashian West: Kimoji App Gear
After the Kimoji app broke the Apple Store due to an insane amount of downloads, the Keeping Up with the Kardashians star banked on its success with the release of Kimoji-themed gear, which included lighters, hats, phone cases and more. "All the new Kimoji merch sold out!!! Thanks you guys!!!" Kim tweeted after debuting her collection. "Can't wait to see you in it!"
4. Kourtney & Co.: Kardashian Kids Clothing Line
The Kardashian sisters may have ownership, but Kourtney is at the helm of the pint-sized fashion line. Since debuting their kids-only line in 2014, the trio has expanded Kardashian Kids to include toddler sizes instead of solely catering to babies up to 24 months.
5. Kim & Co.: Yeezy Collection
The Kardashian-Jenners aren't just known to elevate their own ventures — they've promoted their loved ones' as well, such as Kanye West's Yeezy line. While the rapper's collection has done well on its own, there's no question that having a supportive family known to rock West's designs on the runway and while out and about has led his products to sell out.
6. Kendall Jenner: Estee Lauder Lipstick
It only took three days for the model's limited edition lipstick, created for Estée Lauder, to sell out. Unsurprisingly, the "Restless" lipstick (an orange-spiked red hue) continued to reign in interest from Kendall fans and beauty aficionados alike. According to Estée Lauder's Communications Manager, there have been over 200 requests for Kendall's shade since it sold out.
7. Kim & Co.: Waist Trainers
Aside from photo-ready contouring, the Kardashian-Jenners have become synonymous with waist trainers — prompting editor-tested articles and an influx of newly-converted trainer devotees. And while the clan hasn't created their own line of Kardashian Waist Trainers, Kim, Kourtney, Khloé and Kylie have shared their favorite brands on Instagram.
This article originally appeared on People.com.