Trendy lip color products

You know how you get tempted when you see lip products or color cosmetics just because they are the latest trendy colors?

What should I do if I buy something because I like the color, but it turns out not to suit me? I don't buy high-end products, so I usually just give them away to friends or colleagues, telling them I used them once. In this case, should I just leave them sitting around? How should I handle them?