All four of mine are 90* at the bottom, and have a 180* trap piece at the top. I could not use a straight one in my kettles without filling them very full. A straight one would also be harder to use in my rectangular cooler mash tun. I like the hook at the top for avoiding having any splash get down inside, and also for hooking them onto the side of my kettles. I am using kettles, not keggles, so there is no inner lip to clear.