Threshold wax melts first came out in September 2020, and since then they've had new scents in spring & fall. They're the only retail wax melts that can compete with Walmart wax in terms of scent quality and price, although they're 2 oz. instead of 2.5 oz. (tiny difference), the wax is slightly crumbly (but not like soy wax), and the clamshells are flimsy and tend to stay open a bit unless you snap all corners shut.