HuffPost may receive a commission from some purchases made via links on this page. Every item is independently curated by the HuffPost Shopping team. Prices and availability are subject to change. Every Prime Day , there’s always a surprising stand-out item that sells like hotcakes. One year, it was the Gorilla Grip bath mat, and each year since, people have bought it by the hundreds . It’s not hard to see why: People love it because of how it feels on their feet, how easy it is to clean, and,