I recently found an unopened Sinoz Cosmetics product in my drawer that I don't remember buying. What is the shelf life of these products?

The first thing you should do is to talk to Sinoz Cosmetics: Call their customer service and tell them what the product is called or how it works. They should be able to get specific information about a product and confirm how long it will last.

If Sinoz Cosmetics can't give you specific information, here are some general rules you can follow for cosmetics that haven't been opened:

• Creams and lotions usually last between 12 and 18 months if they are not opened.

• Because they are more powerful, serums and concentrates may only last 6 to 12 months.

• Powders and eyeshadows can last up to two to three years, but mascaras and liquid eyeliners may only last three to six months.

Keep in mind that these are just rough guesses. For the most accurate information on a product's shelf life, always look at the information on the package or from the manufacturer.