The loop at the top means you can actually hang gin and tonics over the hearth and use the nozzle at the foot of the stocking to fill yourself full of mirth. Santa's Flask is made of BPA-free, food-grade plastic, so it's safe to use even if it's not the most attractive mantel decoration in the house. (Though, it's inarguably superior to little cherubs.) It's so ridiculous that you'd probably actually use it, so everything kind of evens out in the end.
With shipping, the stocking runs $18.99, but it's a small price to pay to impress your red-coated friends at Santa Con or to secretly have an extra drink at a family gathering.