At TotalBeauty.com, we're (surprise!) total beauty-hoarding junkies. While this means we're constantly running out of counter space (and under-the-sink space, and medicine cabinet space, and pretty much every other space our roommates and significant others allow us), it also means we know what we like. And when we really like something, we find it hard to live without it. Case in point: One member of our editorial team recently bought an entire case of mascara on eBay after she found out it had been discontinued. Turns out, we all have a product we'd secretly like to stockpile in a beauty fallout shelter. Do you have a product you can't live without? Let us know in the comments below, and click ahead to see the one product we just won't give up.

"I've never been dedicated to one mascara before -- I've always just worn whatever is new, and then moved on to the next one. But when I started using this YSL mascara a few months ago, it was true love. Now, I'm starting to panic that I'm near the end of the tube. With new mascaras, I've been doing side-by-side comparisons -- using the YSL on one eye and the other mascara on the other eye. Nothing even comes close. While I'm lucky that my lashes are naturally long, they're thin and puny, and this mascara makes them look incredibly full -- better than any mascara I've ever tried." --Dawn Davis

"Discovering this primer was the best thing that ever happened to my sensitive skin. I've tried a million different kinds and they either made me break out or felt too greasy and sticky. Not this one. It goes on silky and smoothes my skin so that it's a blank, even canvas for foundation, which is no easy feat given my combination oily/dry skin. I ran out of this product once -- it was a dark few days before I could get my hands on more. I learned my lesson. Now I hoard it." --Allie Flinn

"At any given time, you'll find me toting around a fistful of lip glosses in my purse. I'm constantly slathering it on and feel slightly panicky if I happen to find myself without it. But I'm past the point where any old gloss will do. BareMinerals Marvelous Moxie Lip Gloss has become my go-to. Its semi-sheer color makes me look finished when I wear it by itself and it also gives me a touch of sheen when I layer it over matte shades. Plus, I love the way it feels on. It's not sticky, it tastes like peppermint and it tingles a little bit -- in a good way." --Mary Squillace

"If my brows aren't done, I feel more naked than I'd feel if I were actually naked. Luckily, I've discovered the Paula's Choice Brow-Defining Cream Duo. This thing is basically four products in one. First and foremost, it's an easy-to-use, customizable brow kit. But you can also use the two colors for eye shadow or a smudgy cream eyeliner. If you were really desperate, I bet you could even MacGyver the brow brush and dark brown color into a makeshift mascara. Regardless, I'd never survive the apocalypse without this."
--Amanda Montell