The compression is to increase the concentration of H₂ that's dissolved in the water.

Your one says 1400 ppb which is about as high as it goes unless you compress it.

I just ordered this one. Hoping it's not a scam 😆

PRODIGY X Hydrogen Water Bottle - Portable Hydrogen Generator - 10,000ppb Potency - Thick Bottle - Water Molecular Ionizer - Premium Bottle AUS Owned https://a.co/d/0stkb2B