These New Serums Don't Look Like Any We've Ever Seen Before

What makes a serum a serum? If you're thinking: a liquid-y substance packed with small molecules of active ingredients (like vitamin C and hyaluronic acid), made to better absorb into the layers of the skin, you're absolutely right -- or at least you used to be. The latest serums are defying traditional form, with pressed options that feel more like pudding in the jar (and are a heck of a lot more travel-friendly), SPF-laced formulas, and even some that look like Dippin' Dots. Can the new breed ...