Image Source: Getty / Anthony Harvey [1]

If watching Keeping Up With the Kardashians for nearly a decade has taught us anything, it's that Kourtney Kardashian doesn't take any bullsh*t from anyone, and she knows what she likes. Kourtney's decisive nature is also evident in her makeup choices. In a recent blog post detailing her vacation beauty essentials [2], the eldest sister said she's stuck to the same mascara since college.

On her subscription-based website and app, Kourtney explained, "I don't wear much makeup when I'm on vacation and usually go for a more natural vibe," adding, "When it comes to mascara, I have used Lancôme ever since college." Kourtney's preferred mascara is Lancome's Hypnose Buildable Volume Mascara [3], also known as the Custom Volume Mascara. While vacationing, Kourtney will use both the regular mascara in black and its waterproof iteration [4].

In an interview with POPSUGAR in 2016, Kourtney also name-dropped the beauty brand [5] when she said, "I love Lancome . . . I've always used Lancome mascara." In addition to the mascara, she also uses the Cils Booster XL Mascara Primer [6] ($26) and Charlotte Tilbury's Life Changing Lashes Eyelash Curler [7] ($22).

If Kourtney has stuck with this mascara through 13 seasons, three children, and much more, then we'd definitely consider this a foolproof recommendation.

Lancome Hypnose Custom Volume Mascara [8] ($28)