1) A majority of web sites recommend using suction instead of pressure to eliminate a clog. But almost all new products on the market are aimed at using pressure. This is stupid.
2) Flanged plungers have a failure mode where the flange inverts, capturing sewage that can't be drained out.
3) The suction-cup bellows design here has no failure modes
4) This design, when used in suction, can apply at least 60% more force to a clog than any other manual design tested.
It uses the principle of a suction cup to seal itself to any toilet, old or new and apply maximum force to the clog.
I am currently working on finding a manufacturer and developing a marketing plan.
It is patent-pending.
Why it's the best toilet plunger available to unclog toilet