For this week’s challenge, I’m urging you to label your cosmetics upon purchase. If your product permits, you can write it directly on the ingredient label. If not, you can use a little sticker to do the job for you.
The reason for this challenge is because all cosmetics have a shelf life and you can’t use them indefinitely. For example, sunscreens expire in one or two years while mascaras can last you about three to six months.