My version
I have created my own tube and system that is getting pretty good results.
I bought this water filter( )(CLEAR!) and took the white PVC fitting off the end and put on a black rubber 2” to 2” connector (found at hardware store) and sealed it tight against the cylinder with a large hose clamp. I smoothed the edges so that it doesn’t hurt. I use clear braided tubing to a barbed nipple to create the suction with my mouth. I pump with water as warm as I can stand it and use a condom that I have cut the head out of and put it on upside down where the ridge sits right up under my glans with some slack for length expansion. It has been working great for me!
What do you guys think?