Originally created by The Gel Bottle, BIAB (builder gel) helps keep your natural nails healthy. Emily Brady, from Melted Mango Salon, often uses BIAB on her clients — and there’s a reason. “BIAB (Builder in a Bottle) is a strengthening gel system that sits somewhere between gel polish and hard gel. It’s typically applied from a bottle like polish, but it’s thicker, so it adds structure to the natural nail,” she tells Refinery29 Australia. The nail artist uses this technique for her clients looking to add a bit of strength to their natural nails. “It helps create a nice shape of the nail and allows it to grow longer without breaking,” she adds.