NOT FOR BREATHING! Breathing requires the ‘extra’ mitigation of the drinking water bubbler to assure there is NO LYE going into the lungs. NONE! EVER!
I’ve breathed a tiny amount of lye into my lungs back in 1996 when I was first experimenting with breathing the gas. You do not want that BURNING in your chest, resulting in lung damage and pneumonia type symptoms (very painful).
I also do not even recommend bubbling water with gas that hasn’t gone through the drinking water container. As a matter of habit, all gas used should go through all the bubblers.