So in my travels (meaning in my time researching products), I came across the EcoFlow showerheads from Waterpik. I've read good things about them but I couldn't find the actual GPM on the Waterpik website (they just say "This latest innovation in eco-friendly technology reduces water consumption by up to 28%. Within one year, you can save more than $901 on your water bill - meaning this shower head pays for itself in less than 6 months").
And while it's all good and well to save $90 on your water bills every year...I still wanted to know the flow rate. So I emailed their customer service. And this is what I just got back:
For expedited service, please ensure your response includes all previous e-mail correspondence.
Thank you for contacting Water Pik, Inc. and allowing us to assist you.