http://www.realsimple.com/beauty-fashion/makeovers-tips/expiration-dates-beauty-products-10000001573139/Anti-aging and acne treatments: Three months to a year. Antioxidants are easily oxidized, so be on the lookout for any changes in color. Body lotion: Two to three years, particularly if it’s in a pump container. Shampoo, conditioner, and shower gel: About three years. Bath oil: One year. Sunscreen: Check the package for an expiration date. Mascara and liquid eyeliner: Three to four months. Make sure you’re diligent about replacing these items to prevent contamination and infections. Eye and lip pencils: Three to five years. Sharpen them before each use as a way to preserve them and keep them clean. Lipstick and lip gloss: Two to three years. Foundation: About two years. Most bottles are designed to last that long. And if you don’t use it, chances are you didn’t love it to begin with. Perfume: About two years. To get more mileage out of a perfume, resist the temptation to display a pretty bottle on your vanity. Instead, stash it away in a cool, dark place. Nail polish: One year. Hairstyling products: Three to five years. Most are alcohol-based, which helps preserve the formula. Bar soap: Up to three years. Shaving cream: About two years. Deodorant: Up to two years.