My design concept stems from the fact that the pressure in a tube increases exponentially based on the length of the tube compressed. I would like to design a tube that increases pressure at a more constant rate. I would imagine that a tube curved inward toward the base would achieve this. As the air in the tube is being compressed by a greater distance, less air would be compressed since the size of the tube decreases. This would decrease the amount of pressure needed. However, I am not all sure if this would work, and I would be curious to hear your opinions on it.