"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
"I've tried a lot of different mascaras, but I keep coming back to M.A.C. It defines, lifts and curls my puny lashes like no other. This is also one of the only mascara brands that will not leak under my eyes or rub off on my brow bone. There may be cheaper drugstore brands that look just as good for the first couple of hours, but this one is worth the confidence that comes with knowing my mascara isn't giving me black, half-moon circles under my eyes. If this product is discontinued, I will (probably) die, so it won't matter if the end of the world is near." --Emily Woodruff
"My favorite beauty product of all time is Dior Addict Lipstick in Diablotine -- it's the perfect your-lips-but-better shade. The formula plumps lips (without the peppermint sting) with a unique shiny finish. It has 25 percent less wax in the formula than most other lipsticks, which cuts down on the dated, dry look some lipsticks impart. I personally hate the sticky, wet feeling of lipgloss, but definitely love the sheen of it. This lipstick is the perfect combination of pigment and a glossy finish, without the goopy gloss feeling." --Kelly Searle
"Most people would look at this purple eyeliner and think it's a color for a night out, but it's an everyday staple for me. With dark eyes and dark hair, black eyeliner has never looked daytime appropriate on me, and I just haven't found a brown eyeliner I like. This purple shade is the perfect pop of color to make my eyes stand out without making me look like a raccoon. The unusual color always draws compliments and I never have to worry about it smudging down my face. Even after swimming, the product still stays on until I scrub it off." --Hayley Mason
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.