Why do I need to buy a Breather, won't breathing through a straw or blowing up a balloon do the same thing?

Why do I need to buy a Breather, won't breathing through a straw or blowing up a balloon do the same thing?

The resistance provided by THE BREATHER is much higher than the resistance produced by the mentioned approaches.
While there is a similar principle, the difference is like that between lifting a tennis ball to lifting a 20 lb weight.

The resistance provided by THE BREATHER is graded from very light to heavy and is consistent throughout the breath whereas breathing through a straw or balloon does not provide a consistent level of resistance throughout the breath cycle and can't be adjusted to increase or decrease difficulty when these changes need to be made.