Tropic Sun Drops Gradual Tanning Facial Serum Just a few drops of Tropic Sun Drops Gradual Tanning Facial Serum (£22) added to your moisturiser gives your skin a natural-looking, sun-kissed glow without the worry of breakouts or clogging pores. If you're not convinced, let these before-and-after pictures persuade you that you need these in your life. Image Source: tropicskincare.com