Oxballs juicy has been my favorite. I use argon or coconut oil which gets everywhere. To help prevent the balls and cords from getting sucked in, I wipe the bottom of my shaft to remove some of the oil. The juicy ring is pretty sticky on non-oiled skin. And it’s not restricting/tight around your member. I gave myself a varicocele from pumping so I’m very sensitive to the cords getting sucked in.
Search “oxballs juicy” on the sub Reddit, I made a post a couple months ago.